Tokyo Sea Life Park Tokyo Sea Life Park

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MikeG

Well-Known Member
15+ year member
I came across the following news report from a few days ago:
Staff at Tokyo Sea Life Park are baffled by the deaths of over 150 fish in one of its display tanks.
The aquarium has just one surviving fish — a bluefin tuna — left in the giant 30m/98ft Voyagers of the Pacific exhibit that up until December last year held almost 160 fish: bluefin tuna, mackerel tuna and striped bonito.
Staff are unable to find out why the population in the tank has suddenly crashed. Only 30 fish were left alive by the middle of January and earlier this week the body of one of the two remaining fish was removed.
Investigation is under way, looking at a range of possibilities including lighting, noise and vibration levels, nutrition, and toxins. Computers to monitor both the water and the fish found no abnormalities.
"An earlier examination has found some sort of virus among some of the dead fish, but it wasn’t the kind that is usually fatal in fish farms," a spokesman said.
 
Two big pieces of news!
First of all, there is a new coral reef exhibit! Not many species are mentioned, but I could ID blue-green chromis and pyramid butterflyfish (which are mentioned on the blog post)
Second of all, the scalloped hammerheads, cownose rays, blacktip reef sharks, whitecheek sharks, Japanese pilchards, and Japanese bullhead sharks have all been moved to a different tank in the aquarium. Don't know which one specifically, they don't mention it.
https://twitter.com/KasaiSuizokuen/status/1551432151861760001
 
Tokyo Sea Life Park has successfully transported and hatched a fertile egg of the little penguin from Ballarat Wildlife Park in Australia.

Because of the risks of infectious diseases like avian influenza and the stress of long-distance transport, the aquarium focused on moving fertile eggs instead of live birds. They had been working with the Zoo and Aquarium Association (ZAA) in Australasia since 2017, and in July 2025, four eggs were brought from Ballarat to Tokyo. Three of the eggs turned out to be infertile, but one developed normally and hatched on July 12. Sadly, the chick died a few days later due to pneumonia. Still, this was a big step forward for the project.

Tokyo Sea Life Park has been keeping little penguins since 1991, but Japan hasn’t imported any new individuals since 2005. With many of the current birds closely related, the team hopes this kind of international collaboration will help maintain the genetic diversity of the population in Japan.
 
Ebirah766 said:
Two big pieces of news!
First of all, there is a new coral reef exhibit! Not many species are mentioned, but I could ID blue-green chromis and pyramid butterflyfish (which are mentioned on the blog post)
Second of all, the scalloped hammerheads, cownose rays, blacktip reef sharks, whitecheek sharks, Japanese pilchards, and Japanese bullhead sharks have all been moved to a different tank in the aquarium. Don't know which one specifically, they don't mention it.
https://twitter.com/KasaiSuizokuen/status/1551432151861760001
Click to expand...
As on March this year, this tank houses:
Domino Dascyllus Dascyllus trimaculatus
Moorish Idol Zanclus cornutus
Sixbar Wrasse Thalassoma hardwicke
Moon Wrasse Thalassoma lunare
Jewelled Blenny Salarias fasciatus (signed, not seen)
Lavender Tang Acanthurus nigrofuscus
Japan Surgeonfish Acanthurus japonicus
Pacific Sailfin Tang Zebrasoma velifer (signed as Zebrasoma veliferum, a synonym)
Lollyfish Sea Cucumber Holothuria atra
Synaptid Sea Cucumber Synapta maculata (signed, not seen)
Sunburst Coral Galaxea fascicularis (signed)
Acropora Coral Acropora solitaryensis (signed)
Acropora Corals Acropora spp. (signed)
Smooth Solitary Coral Stylophora pistillata (signed)
Cactus Coral Pavona decussata (signed)
Fungiid Corals Fungiidae spp. (signed)

The former inhabitants of this tank have been moved to the large tuna tank, but separated with dividers from the Pacific Bluefin Tuna. Japanese Bullhead Shark and Whitecheek Shark seem to no longer be on display (not signed or seen)
 
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