Rarely Talked about or seen Animals

My list:
1. Go to Wikispecies
2. Copypaste the whole list
3. Delete the 0'000001% of the list (the ABC animal species)
Then you will have all the "rarely talked about animals", or which is the same, all the animals (almost).

"Seen" is a very different thing, because many people see very often a lot of species that nobody will talk about never. For example I see very often Scaurus punctatus in my zone bur I highly doubt that is ever mentioned in the whole Zoochat (supposedly a community of animal nerds, so imagine how would be it for "normal" people!)
 
Any nematodes besides the ones that parasitize humans and domestic animals
Any mantis shrimp besides the Zebra and Peacock ones
The Hamerkop (as opposed to the Shoebill)
Gnatcatchers, Wrentit, Bushtit, and Verdin (as opposed to other North American passerines)
Caenolestids or shrew-opossums (versus practically all other mammals, probably because the “orders” within the marsupials aren’t taught as much as the “orders” of placentals)
Lutrine opossums (for those who know the Yapok as the only aquatic marsupial)
Australian native rodents (for those who think that bats and marine mammals are the only native Australian placentals)
 
Australian native rodents (for those who think that bats and marine mammals are the only native Australian placentals)
I've read various books saying that practically all Australian mammals are marsupials. Very few books mention Asian marsupials.
 
According to Wikipedia, there are roughly the same number of bat and rodent species combined as there are marsupials. Most native mammals you actually come across tend to be marsupials, understandably.
 
Australian native rodents (for those who think that bats and marine mammals are the only native Australian placentals)
And we have some very cool ones! I'm very fond of the Rakali (Hydromys chrysogaster), a medium-sized semi-aquatic murid - essentially the closest thing Australia has to an otter!

Any mantis shrimp besides the Zebra and Peacock ones
This one I understand, frankly - of the over 500 living stomatopods, within the two main "smasher" and "spearer" ecologies, few differ much from each other visually or behaviourally - most are small, plain-coloured, lack much in the way of patterning and are generally small and cryptic. The well known Peacock and Zebra mantis shrimps are just among the largest and most attractive of the stomatopods, so it makes sense that they are the best-known of them.

I've read various books saying that practically all Australian mammals are marsupials. Very few books mention Asian marsupials.
Most of the mammals you regularly see in Australia are marsupials (as they occupy most medium to large mammal niches), bats and rodents on the other hand are much more cryptic (with the exception of the pteropodid fruit-bats). There are plenty of small and cryptic marsupials too.
 
There are plenty of whole families (or even orders!) of fish that are rarely mentioned and are unfamiliar to most - this is a non-exhaustive list

Lampreys of the families Geotriidae and Mordacidae are very obscure compared to the better-known Petromyzontiidae lampreys.

Sharks and rays:
Brachaeluridae (blind sharks)
Parascylliidae (collared carpetsharks)
Pseudotriakiidae (false catsharks)
Echinorhinidae (bramble sharks)
Platyrhinidae (fanrays)
All skates of the order Rajiformes except Rajidae (hardnose skates)
Zanobatidae (panrays)
Hexatrygonidae (Sixgill Stingray)
Plesiobatidae (Giant Stingaree)

Ray-finned fishes
- Elopidae (tenpounders)
- Notacanthiformes (deep sea spiny-eels and halosaurs)
- Protanguillidae (Palauan Primitive Cave Eel)
- pretty much all members of the Anguilliform suborder Anguilloidei (sensu Near & Thacker) except the Anguillidae (freshwater eels) and Eupharyngiidae (Gulper Eel)
- All members of Gonorhynchiformes except the Milkfish - this order also includes Kneriidae (shellears), Gonorhynchidae (beaked salmons) and Phractolaemidae (hingemouth)
- All members of Argentiniformes except the Pacific Barreleye - this order also contains Argentinidae (argentines), Microstomatidae (pencilsmelts), Bathylagidae (deepsea smelts), and the other members of Opisthoproctidae (barreleyes)
- All members of Osmeriformes except Osmeridae (smelts) - this order also contains Plecoglossidae (Ayu, well-known in Japan but obscure elsewhere), Salangidae (noodlefishes) and Retropinnidae (New Zealand smelts)
- Gonostomatidae (bristlemouths) and Phosichthyidae (lightfishes, although this family is probably polyphyletic)
- Atelopodidae (jellynoses, the only extant family in Atelopodiformes)
- Paraulopidae (cucumberfishes)
- Chlorophthalmidae (greeneyes)
- Notosudidae (waryfishes)
- Scopelarchidae (pearleyes)
- Paralepididae (barracudinas, probably polyphyletic)
- Omosudidae (Hammerjaw)
- Neoscopelidae (blackchins)
- Veliferidae (velifers)
- Radiicephalidae (tapertails)
- Lophotidae (crestfishes)
- The entire order Percopsiformes may be familiar to freshwater fishermen in North America but is obscure elsewhere - contains 3 families, Percopsidae (Trout-perch and Sandroller), Aphrododeridae (Pirate-perches) and Amblyopsidae (Cavefishes)
- All Zeiformes except Zeidae (typical dories) - also includes Cyttidae (lookdown dories), Oreosomatidae (oreos), Grammicolepididae (tinselfishes), Zeniontidae (dwarf dories) and Parazenidae (parazens)
- Diretmidae (spinyfins)
- Melamphaidae (bigscales)
- Gibberichthyidae (gibberfishes)
- Hispidoberycidae (Bristlyskin)
- Stephanoberycidae (pricklefishes)
- Kurtidae (nurseryfishes)
- Trichonotidae (sand-divers)
- Xenisthmiidae (collared wrigglers)
- Ariommatidae (ariommas)
- Amarsipidae (Amarsipa)
- Caristiidae (manefishes)
- Draconettidae (slope dragonets)
- Phallostethidae (priapumfishes) and Dentatherinidae (Tusked Silverside) - combined by Near & Thacker into a more inclusive Phallostethidae
- Isonidae (surf sardines)
- Congrogadidae (eel-blennies) - formerly included in Pseudochromidae (dottybacks) but genetic evidence suggests that eel-blennies are not closely related to dottybacks
- Plesiopidae (roundheads) outside of Australia except the Comet/Marine Betta
- Lactariidae (False Trevally)
- Leptobramidae (beachsalmons)
- Polynemidae (threadfins)
- Acanthistius (wirrahs and koesters) - currently assigned to the familiar Anthiadidae, but genetic evidence suggests that they would be better placed in their own family
- Bembropidae (duckbill-flatheads)
- Niphonidae (Ara Grouper) - previously assigned to Epinephelidae (and before that, Serranidae)
- Percophidae (Brazilian Flathead)
- Bovichtidae (thornfishes), perhaps more familiar to tidepoolers in southern Australia
- Pseudaphritidae (Congolli/Tupong)
- Eleginopsidae (Patagonian Blenny)
- Harpagiferidae (plunderfishes)
- Normanichthyidae (Mote Sculpin)
- Congiopodidae (Horsefishes)
- Agonidae (poachers)
- Bathymasteridae (ronquils)
- Zaproridae (Prowfish)
- Ptilichthyidae (Quillfish)
- Dichistiidae (galjoens) - familiar in South Africa, obscure elsewhere
- Caesioscorpididae (Blowhole Perch)
- Parascorpididae (Jutjaw)
- Centrogenyidae (false scorpionfishes)
- Cheimarrichthyidae (Torrentfish)
- Leptoscopidae (southern sandfishes)
- Acropomatidae (lanternbellies)
- Ostracoberycidae (shellskin alfonsinos)
- Symphysanodontidae (slopefishes)
- Epigoniidae (deepwater cardinalfishes)
- Howelliidae (oceanic basslets)
- Dinolestidae (Longfin Pike)
- Banjosidae (banjofishes)
- Synagropidae (splitfin ocean-basses)
- Creediidae (sand-burrowers)
- Dinopercidae (Cavebass and Chapin's Barred Seabass)
- Emmelichthyidae (rovers)
- Leiognathidae (ponyfishes and slipmouths)
- Callanthiidae (splendid-perches and groppos)
- Cepolidae (bandfishes)
- Lophichthyidae (Boschma's Anglerfish)
- Pretty much all families of Ceratioidea (bathypelagic anglerfishes) except Himantolophidae (footballfishes) and Melanocetidae (black seadevils)
- Triodontidae (Threetooth Puffer)
- Triacanthodidae (spikefishes)
 
Zebra mantis shrimps are just among the largest and most attractive of the stomatopods, so it makes sense that they are the best-known of them.
Wasn't even aware of Zebras but I at least know that the 'others' exist along with I assume a lot of people with closer ties to the ocean, I believe and have at least seen the 'non descript' spear-type mantis shrimps being sold for food in quite a few seafood markets. (In China)
 
Malagasy civets, including the Fanaloka. Many people have never heard of, much less seen one of these fascinating carnivorans.
Nashville’s recent acquisition of this species gives me hope for formerly ignored small carnivores, and possibly opens up a future for Malagasy civets in AZA-accredited zoos.
 
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