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Ocean animals

Bicolor anthias

Amazing fact

In bicolor anthias, larger individuals change sex to become male.

公益財団法人 黒潮生物研究所
Bicolor anthias in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

In bicolor anthias, larger individuals change sex to become male.

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THE REAL WORLD

The real Bicolor anthias

Scientific name
Pseudanthias bicolor
Japanese name
フタイロハナゴイ
Group
Ocean animals
Order
Perciformes
Family
Serranidae
Genus
Pseudanthias
Facts about the real animal.
01

It lives from the Izu and Ogasawara islands and the Ryukyu Islands across the Indian and Pacific Oceans.

02

Its upper and lower halves are different colors.

03

Males and females are colored much alike, but in males some spines near the front of the dorsal fin grow long.

How the Bicolor anthias lives

It lives in rocky areas and on coral reefs. It sometimes schools with sea goldies and red-belted anthias. It lives in a harem group of a male and females.

粟国村公益財団法人 黒潮生物研究所

Basic data

Range
Izu Oshima, Hachijo Island, Ogasawara Islands, Ryukyu Islands, southern Taiwan, Indo-Pacific, and elsewhere
鳥羽水族館

Where the Bicolor anthias has been recorded

World map with dots where the Bicolor anthias has been recorded
Each dot marks a place with observations or specimens shared on GBIF. Some records are of animals that strayed or were brought by people, so the dots are not always where the animal lives.

Records: GBIF.org (CC0 and CC BY 4.0 records, retrieved 2026-11-07). Map: Natural EarthSee the records on GBIF

Watch wild animals from a distance. Do not touch or feed them, and take care of the places where they live.

Names around the world

简体中文
双色拟花鮨
繁體中文
雙色擬花鮨
Bahasa Indonesia
Ikan gadis dwiwarna

Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.

Sources and how we check

We check each fact against its source. The illustrations simplify how the real animal looks.

The classification (class, order, family, genus) follows Wikidata records, checked against GBIF. Classifications can change as research goes on.

The basic data are the values given in each source. They vary with how the animal is measured, whether it is male or female, and whether it lives in the wild or in captivity.

This page was translated from the original Japanese with the help of AI.

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