Zoo Stock Species and the Red List

Zoo Stock

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This indicates that the species is included in the Second Zoo Stock Plan, which was formulated by the Tokyo Metropolitan Government in 2018. The plan sets goals for the next 10 years in three areas: "species conservation," "contribution to wildlife conservation," and "environmental education and conservation awareness." 124 animal species are included.

What is the Red List?

Based on scientific research, this is a list of wildlife classified by rank (category) indicating the degree of risk of extinction.
Livng Things Encyclopedia shows the categories (mainland and islands) assessed by the IUCN (International Union for Conservation of Nature) at the global level, the Ministry of the Environment for Japan, and the Tokyo Metropolitan Government for Tokyo.

The higher the category in each table, the higher the risk of extinction, and CR, EN, and VU are the three categories known as "endangered species." In Tokyo, species that are not at the NT (near threatened) level but are relatively rare are considered "species of concern."

IUCN categories

EX

extinction

EW

Extinction in the wild

CR+EN

CR

Serious crisis

EN

crisis

VU

emergency

NT

Near Threatened

LC・○

Low Concern

DD

Data shortage

LP

Japan (Ministry of the Environment) Category

EX

extinction

EW

Extinction in the wild

CR+EN

Endangered species

CR

Critically Endangered

EN

Endangered species

VU

Endangered species

NT

Near Threatened

LC・○

DD

Lack of information

LP

Endangered
local population

Tokyo Category

EX

extinction

EW

Extinction in the wild

CR+EN

Endangered species

CR

Critically Endangered

EN

Endangered species

VU

Endangered species

NT

Near Threatened

LC・○

Unranked

DD

Lack of information

LP

Endangered
local population

Creatures at Tokyo Sea Life Park

Weedy Seadragon

Phyllopteryx taeniolatus

Weedy Seadragon
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ウィーディシードラゴン3

It is a member of the pipefish family. It has leaf-shaped flap-like structures all over its body. These are not fins, but modified skin called flaps. The way it swims about makes it look like torn pieces of seaweed. It eats by sucking in small creatures with its long, thin mouth.

classification Actinopterygii, Syngnathidae
English name Weedy Seadragon
distribution Coastal areas of southern Australia and around Kawakawa
Residence Sandy areas and rocky reefs where seaweed and seaweed grow
Size
Total length: 30cm
food Small fish and crustaceans
Red List
IUCN: VU (Very)
Tokyo Sea Life Park exhibition area

Which is the real fin?

Weedy Seadragon

The leaf-like parts sticking out from the body of Weedy Seadragon are called skin flaps, and are not fins but modified skin. So where are the real fins? In fact, the real fins are transparent and hard to see because they disguise themselves as seaweed. If you look closely, you should be able to see the pectoral and dorsal fins moving. Let's try to find them.

By the time you realize it, it's already too late

Weedy Seadragon

Weedy Seadragon looks like a piece of seaweed and floats about. Its mouth is long and thin, shaped like a straw. It pretends to be a piece of seaweed and sneaks up on small creatures, sucking them in with its mouth and eating them. It pretends to be harmless, lulling its prey into a false sense of security, and by the time its prey realizes it, it's already too late.

Sea Dragon is a good father!?

Baby Weedy Seadragon

During the breeding season, the underside of the male Weedy Seadragon 's tail swells up, where the female lays her eggs. The male then guards the eggs for just under two months until they hatch. In 2019, Tokyo Sea Life Park became the first in Japan to successfully breed them in an aquarium. Newly hatched Weedy Seadragon are just under 3cm in length. They have skin flaps like their parents from birth, and are able to feed themselves.