FISHES
This is the one group of animals where I will definitely be missing quite a lot of species, because I only recently started to collect information on what fish were kept, with most inhabitants of the Aquatics House fish room likely missing – the 2003 map mentions several fish simply by broad groupings, such as arowanas, barbs, glassfish, halfbeaks, catfish and cichlids. Originally, fish were mainly kept in the Aquatics House, now called Worlds Apart; the tanks here housed a mixture of marine and freshwater species. Nowadays, only freshwater fish live in Worlds Apart, but there are aquaria scattered throughout the zoo – most of the animal houses have at least one species of fish. Behind the mammals, the fish are the second most diverse group of animals displayed at Colchester Zoo, something I fully expect will continue into the future. As for interesting fish that never materialised, both seahorses and ‘sea bats’, presumably some kind of ray, were planned for the aquarium in 1972, but the international dispute with the supplier country of Malta prevented this. There were also apparently plans in around 1983, when the Tropeano family took over Colchester Zoo from the Farrars, for sharks to be brought into the collection – however, the new owners ultimately decided to make improvements to what was already there over bringing in lots of new species.
Past holdings:
Freshwater butterflyfish,
Pantodon buchholzi
A large group of these fish, fifteen altogether, arrived at the zoo in 2014. Their numbers dwindled, but a smaller number were brought into the zoo in 2018. The last one went to a private keeper in 2020. Throughout this time, they lived in the water surrounding the leaf-cutting ant colony in their main nest tank.
Rainbow sharkminnow,
Epalzeorhynchos frenatum
A single individual of this species arrived in the Rivers Edge aquarium in 2019, and lived there until 2023.
African banded barb,
Enteromius fasciolatus
This species of fish was signed at the Lake Victoria tank in Kingdom of the Wild from 2019 to 2022, but was only on-display for a short period within that timeframe.
Red-lined torpedo barb,
Dawkinsia denisonii
This endangered Indian species arrived in 2019, living in the open-topped tank in Rivers Edge. The species left sometime in 2023.
Clown barb,
Barbodes everetti
A shoal of these fish arrived in the open-topped freshwater aquarium in Rajang’s Forest in 2013. The species remained in the collection until 2021.
Spanner barb,
Striuntius lateristriga
This was another fish species that lived in the Rajang’s Forest freshwater aquarium from 2013 to 2021.
Red-bellied piranha,
Pygocentrus nattereri
While they were almost certainly around earlier, the first confirmed record I can find is from 2003, when they lived in one of the tanks in Heart of the Amazon. They later moved to Worlds Apart, where they remained until 2020 when their tank was removed as part of the upcoming Penguin Shores redevelopment.
False blochi corydoras,
Corydoras delphax
I do not know when this species arrived at Colchester Zoo, but they lived in the South American cichlid aquarium in Worlds Apart until 2022.
Peppered corydoras,
Corydoras paleatus
This species of fish arrived at the zoo in 2018, and lived in the South American cichlid aquarium in Worlds Apart. I do not know when they left the collection
Cuckoo catfish,
Synodontis multipunctatus
Photographs online show that this species lived in what is now the Lake Victoria aquarium in Kingdom of the Wild at least in 2006. When this aquarium was renovated from 2018, the catfish moved to Koi Niwa. They left sometime before 2023.
Tete sea catfish,
Ariopsis seemanni
This large catfish species is shown in several photographs online, dating at least from 2004 to 2007. It lived alongside the pacu, in a tank that was later the final home of the red-bellied piranhas. This tank is now off-display as part of the Penguin Shores redevelopment.
Lattice soldierfish,
Myripristis violacea
This species arrived in 2013, with a single individual living in the Kingdom of the Wild marine tank. It no longer seems to be present, and although the signage still labels the species, the picture shows the still-present tailspot squirrelfish.
Dwarf seahorse,
Hippocampus zosterae
A group of 102 of these seahorses arrived at the zoo in January 2006 following a customs seizure. They lived off-show and, at the time of the reporting of the news, just ten of the fish had succumbed due to their poor condition on arrival. Although the zoo said they would remain at the zoo permanently, they never went on-display.
Unidentified seahorse,
Hippocampus sp.
There were seahorses already on-display at Colchester Zoo in 2005 and 2006, within the fish room in the Aquatics House – several photographs on Flickr show these fish. These seahorses may have arrived after 2003, as they are not labelled on the otherwise very detailed map from that year. I am not confident in identifying the exact species, but one notable feature of the photographed animal is that it is black in colouration. This does make me think it could be the dark morph of the slender seahorse,
Hippocampus reidi.
Neon goby,
Elacatinus oceanops
I have a single photograph of one of these small Caribbean fishes dating from 2012, when they lived in what is now the tetra tank in Worlds Apart. I don’t recall seeing it before or after that one time, and I cannot recall if it was even signed.
Yellow-headed sleeper goby,
Valenciennea strigata
A pair of these fish arrived in the marine aquarium in Rajang’s Forest in 2015, disappearing from the collection in 2018.
Giant gourami,
Osphronemus goramy
I have unfortunately lost track of the picture, so cannot find the date it was taken, but a photograph on Flickr shows one of these large fish being kept in a big tank in what is now the Worlds Apart building.
Kissing gourami,
Helostoma temminckii
A tank of these fish are the only species shown in the 1972 guidebook, representing the Aquarium where the Worlds Apart building now stands.
Pindu,
Stomatepia pindu
This critically endangered Barombi Mbo cichlid is recorded from the 2003 zoo map, living in the Aquatics Room in what is now Worlds Apart. I do not know when the species arrived at or left the collection.
Keppi,
Sarotherodon lohbergeri
Another critically endangered Barombi Mbo cichlid, this species is also shown on the 2003 map in the former Aquatics Room. Again, I do not know when this species arrived at or left the collection.
Alkali cichlid,
Stomatepia mariae
I suspect that these cichlids were around for a prolonged period – possibly at least from the opening of Kingdom of the Wild in around 2002. In 2017, the species moved into the smaller tank in Koi Niwa before they left in 2023.
Demon eartheater,
Satanoperca jurupari
This species moved into the South American cichlid tank in Worlds Apart in 2011, and remained there until 2018.
Banded rainbowfish,
Melanotaenia trifasciata
This species of rainbowfish lived in the pool of the Australian Rainbows lorikeet walkthrough from 2018 until around 2022.
Lake Kutubu rainbowfish,
Melanotaenia lacustris
Zootierliste records this species having left the zoo by 2013. Again, I do not know when they arrived, but they lived in the open-air aquarium in the Rivers Edge building.
Common molly,
Poecilia sphenops
A shoal of melanistic mollies lived in the moat of the leaf-cutting ant island in Kingdom of the Wild from 2014 until 2016.
Ocellaris clownfish,
Amphiprion ocellaris
An online photograph from 2006 shows both standard and black-and-white forms of this clownfish living in what is now the Worlds Apart tetra tank. They later moved into one of the small tanks opposite the penguin underwater viewing in Penguin Shores, and left when the tank was removed in 2017.
Tomato clownfish,
Amphiprion frenatus
An online photograph of the former reef tank in Worlds Apart shows that there was a single individual of this species kept at Colchester Zoo in around 2006.
Maroon clownfish,
Amphiprion biaculeatus
The 2003 zoo map shows this species being kept in the marine aquarium in Kingdom of the Wild. They later moved to the tank in Rajang’s Forest, where the last individual was recorded in 2021.
Bluegreen chromis,
Chromis viridis
The zoo map from 2003 shows this species living in Kingdom of the Wild, with photos from 2004 indicating they lived in the touch tank. In 2006, they lived in what is now the Worlds Apart tetra tank. Sometime after this, they moved to the marine tank in Rajang’s Forest, where the last individual lived until 2023.
Humbug damselfish,
Dascyllus aruanus
These damselfish are mentioned on the 2003 map as living in one of the marine displays in Kingdom of the Wild. A photograph from 2006 on Flickr shows them living in what is now the tetra tank in Worlds Apart. I do not know exactly when they arrived at or left the collection.
Electric blue damselfish,
Chrysiptera cyanea
This fish appears on both a 2003 zoo map and a photograph on Flickr from 2007, on both occasions it is shown living in a touch tank in Kingdom of the Wild.
Yellowtail blue damselfish,
Chrysiptera parasema
An individual is visible in the reef aquarium, now the tetra tank, in Worlds Apart from a 2006 online photograph. I do not know when they arrived at or left the collection.
Royal dottyback,
Pictichromis paccagnellae
This species, very similar in appearance to the royal gramma, is first recorded from a 2006 online photograph showing one in what is now the Worlds Apart tetra tank. A pair later lived in the Rajang’s Forest marine tank from at least 2010 until they left in 2019.
Royal gramma,
Gramma loreto
Zootierliste records this species leaving the collection in 2019. I certainly have a photograph of one dating back to 2012 – it lived in what is now the tetra tank in Worlds Apart.
Six-lined wrasse,
Pseudocheilinus hexataenia
While I do not know when this species appeared or disappeared from the collection, it was present in the Rajang’s Forest marine tank in 2015.
Twinspot coris wrasse,
Coris aygula
This species of fish is listed on the 2003 map, and I also recall seeing an online photograph of it. It lived in the marine aquarium in Kingdom of the Wild.
Yellowtail coris wrasse,
Coris gaimard
Zootierliste does not record when this species arrived at Colchester Zoo, but notes that it had left by 2013. I also do not know where in the zoo it lived.
Bicolor goatfish,
Parupeneus barberinoides
This species is listed as a former holding on Zootierliste, although it does not give any years of arrival or departure. I also do not know where it was kept.
Common lionfish,
Pterois volitans
The first common lionfish that I know of arrived at the zoo in 2013, living in the marine aquarium in Kingdom of the Wild. The last individual was kept in around 2022.
Chalk bass,
Serranus tortugarum
I do not know exactly when this species arrived, but it lived at the zoo from at least 2013 until 2021. They were the last former inhabitants of what is now the tetra tank in Worlds Apart.
Sea goldie,
Pseudanthias squamipinnis
The earliest record I can find for this species is from 2010, when they lived in the marine tank in Rajang’s Forest. The last individual was kept until around 2022 to 2023.
Yellow tang,
Zebrasoma flavescens
The zoo map for 2003 mentions this species living in the marine tank in Kingdom of the Wild. An online photograph indicates the species lived here until at least 2009.
Yellowtail purple tang,
Zebrasoma xanthurum
Zootierliste records this species being present at Colchester Zoo between 2006 to 2017. For much of this time, it lived in the marine aquarium in Rajang’s Forest.
Atlantic blue tang,
Acanthurus coeruleus
I do not know exactly when this species arrived at or left the collection, but it was definitely present in what is now the Worlds Apart tetra tank in 2014 and 2015.
Silver moony fish,
Monodactylus argenteu
The first record I can find for this fish species is from 2009. They lived in one of the former tanks opposite the underwater viewing of Penguin Shores, until they left in 2017.
French angelfish,
Pomacanthus paru
I do not know when they arrived in the collection, but this angelfish lived in what is now the tetra tank in Worlds Apart until 2018
Rock beauty angelfish,
Holacanthus tricolor
This is another angelfish that lived in what is now the Worlds Apart tetra tank until 2018.
Cherub angelfish,
Centropyge argi
The 2003 zoo map lists this species as living in one of the marine displays in Kingdom of the Wild. Zootierliste reports that this species left the collection in 2014.
Spotted scat,
Scatophagus argus
The last spotted scat disappeared from the collection in 2019. I do not know when they arrived, but the species lived in the open-air aquarium in the Rivers Edge building.
Bristle-tail filefish,
Acreichthys tomentosus
The first of these fish arrived in Worlds Apart, in what is now the tetra tank, in 2012. Several individuals were kept both here and in Rajang’s Forest, with the last individual recorded in 2023.
Spotted porcupinefish,
Diodon hystrix
An individual of this fish lived in the Kingdom of the Wild marine tank from 2013 to 2016.
Guineafowl pufferfish,
Arothron meleagris
In 2016, a yellow individual of this variable species moved into the Kingdom of the Wild marine tank. It remained there until 2021.
Uncertain holdings:
Fairy cichlid,
Aulonocara jacobfreibergi
This species has much the same history as the alkali cichlid, moving from the current Lake Victoria tank in Kingdom of the Wild to Koi Niwa in 2017 before the tank was emptied in 2023. General ‘Lake Malawi cichlids’ now live in the mud turtle display, which may contain this species.
Slender tapir cichlid,
Labeotropheus trewavasae
This is another cichlid that moved from Kingdom of the Wild to Koi Niwa in 2017, into a tank that was later emptied in 2023. Again, this may be a species in the general ‘Lake Malawi cichlids’ kept in Kingdom of the Wild again.
Cobalt blue zebra cichlid,
Maylandia callainos
This is the third species of cichlid moved from Kingdom of the Wild to Koi Niwa, and again may be part of the general ‘Lake Malawi cichlid’ shoal that has moved back into Kingdom of the Wild.
Present holdings:
Ocellate river stingray,
Potamotrygon motoro
This species first arrived at Colchester Zoo in 2011 with four young moving into the pacu pool in Worlds Apart. They were joined in 2012 by two adult males. Today there are two individuals remaining – an adult in the pacu pool plus a smaller individual mixed with the silver dollars in Heart of the Amazon.
Snowflake moray eel,
Echidna nebulosa
Since 2013, multiple individuals of these small and relatively docile moray eels have been living in the Kingdom of the Wild marine aquarium.
Taiwan bitterling,
Paratanakia himantegus
A large shoal of these fish arrived in 2019 and moved into the larger tank in Koi Niwa. They were at first misidentified as rosy bitterling. Their numbers have gradually declined in that time, and their small size and reduced numbers can make them challenging to spot, but they were still present in January 2024. They are, according to Zootierliste, the only members of their species kept in a European zoo.
Rosy barb,
Pethia conchonius
A large number of these fish arrived in 2019 and now can be found in both the Rajang’s Forest and Rivers Edge open-topped tanks.
Sumatra barb,
Puntigrus tetrazona
The first record I can find for this species is from 2017, when a small group were added to the crocodile pool in Chimpanzee Lookout. By September 2023, these barbs had gone, but in that same month a new shoal arrived and moved into the open-air tank in the Rivers Edge house.
Tinfoil barb,
Barbonymus schwanefeldii
Tinfoil barbs are shown on the 2003 map living in the former Aquatics Room. The next confirmed record I can find is from 2008, when they lived in the open-topped tank in Rivers Edge. Later they moved to the freshwater display in Rajang’s Forest, where they still live today.
Koi carp,
Cyprinus rubrofuscus
While I think it is more than likely they were kept earlier, the first record I can find is from the 1999-2000 map. Between this time and possibly as late as 2010 they lived in the open-topped pond in Worlds Apart, before moving to what is now the South American cichlid tank until 2011. In 2013, the zoo opened Koi Niwa, an entire indoor house dedicated to koi carp, following the posthumous donation of a number of fish to the zoo by Raymond Sawyer. In 2023, additional younger koi carp arrived at the zoo.
Common goldfish,
Carassius auratus
The earliest record I can find for these common domesticated fish at Colchester Zoo is an online photograph from 1974. In the 1990s, goldfish were an ornamental addition to all kinds of water bodies – there was a goldfish pond in the Beginning Zone, roughly where the pool in Iguana Forest now stands, and they were also kept in pools in some animal enclosures such as the jaguars. Today, there is a group in a pond just down the hill from the grey wolves.
European minnow,
Phoxinus phoxinus
This species was also added to the sun bear pool in 2015. The species seemed to do well at first, and even attempted to spawn on several occasions. As of 2024 however, there is only a single individual remaining.
Common roach,
Rutilus rutilus
This species was added to the lower pool in the sun bear’s outdoor enclosure in 2015. Possibly due to extra stocking, there is currently a large shoal of probably over fifty fish as of 2024.
Clown loach,
Chromobotia macracanthus
This species originally lived in the Rivers Edge tank, although I do not know when they arrived. In 2013, some individuals arrived in the Rajang’s Forest display where at least one can still be seen as of 2024.
Black pacu,
Colossoma macropomum
While I am sure they were around earlier, the first record I can find for this species is from 2007 – at the time, they lived in the large aquarium in Worlds Apart later used for piranhas, and now removed as part of the Penguin Shores redevelopment. The species remains in Worlds Apart, now living in the indoor pond.
Silver dollar,
Metynnis argenteus
This species has been present since at least 2003, with the zoo map showing them in one of the tanks in Heart of the Amazon. A sizeable shoal still remains in the same tank to this day.
Glowlight tetra,
Hemigrammus erythrozonus
The first record I have for this species of fish is from February 2023, when they moved into the newly created tetra tank in Worlds Apart.
Penguin tetra,
Thayeria boehlkei
There was a South American aquarium opposite the penguin underwater viewing area until 2017, which may have contained this and the other current tetra species. However, a new group definitely arrived in February 2023, moving into the Worlds Apart tetra tank.
Lemon tetra,
Hyphessobrycon pulchripinnis
This is the third species of tetra that definitely arrived in February 2023, again living in the tetra tank in Worlds Apart.
Cardinal tetra,
Paracheirodon axelrodi
These brightly-coloured and popular aquarium fish arrived at Colchester Zoo in July 2023, with a shoal of fifty moving into the tetra tank in Worlds Apart in the October of that year.
Bronze corydoras,
Corydoras aeneus
Some fish of this species arrived 2018, moving into the South American cichlid tank in Worlds Apart. More individuals arrived in 2023, with some more going into the cichlid tank while others moved into the tetra tank in the same building.
Red gibbiceps catfish,
Pterygoplichthys gibbiceps
In 2011, this species of catfish moved into the South American cichlid aquarium in Worlds Apart, where they remain to this day.
Amazon sailfin catfish,
Pterygoplichthys pardalis
This species arrived in 2010, at first being mixed with both the angelfish and silver dollars in Heart of the Amazon. Today, they only remain in the angelfish tank. Although signed as common plecostomus,
Hypostomus plecostomus, they do not seem to resemble this species.
Ripsaw catfish,
Oxydoras niger
The earliest record I can find for this South American catfish is from Zootierliste, which records it being present in 2018. However, contrary to Zootierliste, this species does still remain in the collection and lives with the pacu and a stingray in the indoor pond in Worlds Apart.
Tailspot squirrelfish,
Sargocentron caudimaculatum
A single individual of this rarely-kept fish arrived in 2017, moving into the marine aquarium in Kingdom of the Wild.
Banded archerfish,
Toxotes jaculatrix
Unidentified archerfish are included on the 2003 map, living in the former Aquatics Room in Worlds Apart. Some individuals of this species moved into the open-topped tank in Rajang’s Forest in 2013, where they remain to this day, while others lived in the open-topped tank in Rivers Edge until 2019.
Freshwater angelfish,
Pterophyllum scalare
Ornamental angelfish have been kept in one of the aquariums in Heart of the Amazon since at least 2010.
Pearl cichlid,
Geophagus brasiliensis
This species of fish arrived in 2011, moving into the South American cichlid aquarium in Worlds Apart. These cichlids appear to have bred multiple times in this display, as young fish are often in evidence.
Lake Victoria cichlid,
Pundamilia nyererei
This species arrived in 2019, and moved into the renovated cichlid tank in Kingdom of the Wild.
Lake Victoria cichlid,
Haplochromis xenognathus
Another species of cichlid that arrived in 2019 and is the other resident of the Kingdom of the Wild cichlid tank.
Lombardo’s African cichlid,
Maylandia lombardoi
This species of cichlid was undoubtedly present for a long time in the zoo – unspecified cichlids are shown being kept in Kingdom of the Wild as far back as 2003, on the map from that year. In 2017, they moved from what is now the Lake Victoria tank into one of the displays in Koi Niwa, with these fish leaving the collection in 2023. However, several fish of this species moved back into Kingdom of the Wild in 2019, mixed with the mud turtles. They remain there to this day.
Dwarf neon rainbowfish,
Melanotaenia praecox
This was one of three species of rainbowfish that arrived in 2014, living in the pool in the Australian Rainbows lorikeet walkthrough. In December 2023, a new large shoal was added to the open-topped tank in the Rivers Edge building.
Boeseman’s rainbowfish,
Melanotaenia boesemani
This was the third rainbowfish species that moved into the Australian Rainbows pool in 2014. In 2022 some of these moved into the Rivers Edge open-topped tank, and were joined by a new group of thirty-five individuals in July 2023. As of 2024, they are still present in Australian Rainbows, although they are now signed simple as ‘rainbowfish’.
Butterfly splitfin,
Ameca splendens
This rare goodeid has been kept from at least 2010, when they lived in a single-species tank opposite the underwater viewing area at Penguin Shores. This tank was removed in 2017, but by 2018 a group had been added to the crocodile pool in Chimpanzee Lookout. Their numbers have now grown considerably, with probably well over a hundred individuals living in the pool.
Azure damselfish,
Chrysiptera hemicyanea
The earliest record I can find for this small threatened marine species is from online images from 2010, where they are shown living in the marine tank in Rajang’s Forest. As of 2024, there is a pair of this species still being kept.
Pennant coralfish,
Heniochus acuminatus
This is another species with a photograph on Flickr dating back to 2005, again seemingly in the Worlds Apart building. This species has also moved to the reef tank in Rajang’s Forest, where a single individual remains to this day.
Regal tang,
Paracanthurus hepatus
There are photographs online of this species dating back to 2006, when they seem to have lived in a tank in the Worlds Apart building. They have since moved to the marine aquarium in Rajang’s Forest, where they are now the only fish in the tank that still lives in a group of more than two individuals.
African moony fish,
Monodactylus sebae
A shoal of these fish arrived in 2012 and moved into the Kingdom of the Wild marine aquarium. Several individuals still live in the tank to this day.
Emperor angelfish,
Pomacanthus imperator
A single individual of this fish has lived in the marine aquarium in Kingdom of the Wild from at least 2015, and is still present there.
Clown triggerfish,
Balistoides conspicillum
A single individual of this species arrived in 2013 and still lives in the Kingdom of the Wild marine tank.
White-spotted pufferfish,
Arothron hispidus
A single individual of this pufferfish arrived at Colchester Zoo in 2021, replacing the guineafowl pufferfish in the Kingdom of the Wild marine aquarium.
Blackspotted pufferfish,
Arothron nigropunctatus
This species is shown on the 2003 zoo map, living in the Kingdom of the Wild marine aquarium. I do not know when this individual left, but the species returned in 2013 to live in the marine tank in Rajang’s Forest. This fish, a female named Patricia, remains at the zoo to this day.
West African lungfish,
Protopterus annectens
The 2003 zoo map shows this species living in the Aquatics Room in what is now Worlds Apart. Not long afterwards the species moved into Kingdom of the Wild, where it lived with the Nile monitor until 2017; at this time, it moved in with the cichlids in Koi Niwa, although it did not remain for long. In 2019, a new individual arrived in Kingdom of the Wild in the Lake Victoria tank.
Although many fish, such as these yellow-headed sleeper gobies, have vanished from the collection, Colchester Zoo still has a rich variety of mostly common fish in aquaria dotted around the park.
If anyone wants to have a go at identifying the seahorses that were on-display, there is one of the photographs in this link:
Sea Horse at Colchester Zoo