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Ocean animals

Redspot cardinalfish

Amazing fact

Male redspot cardinalfish hatch eggs inside their mouths.

日本自然保護協会
Redspot cardinalfish in its habitat (illustration)

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An illustration based on the real animal.

A little discovery to share.

Male redspot cardinalfish hatch eggs inside their mouths.

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THE REAL WORLD

The real Redspot cardinalfish

Scientific name
Ostorhinchus parvulus
Japanese name
ネオンテンジクダイ
Group
Ocean animals
Order
Kurtiformes
Family
Apogonidae
Genus
Ostorhinchus
Facts about the real animal.

Where the name “Redspot cardinalfish” comes from

Its Japanese name refers to its pale blue body looking like neon in dark places.

アクアマリンふくしま
01

It has a clear red spot at the base of its tail.

02

Its body is see-through, so you can see its bones.

03

It lives from Yakushima, Amami Oshima and Ishigaki Island to the Philippines and Indonesia.

How the Redspot cardinalfish lives

It lives in calm bays where unpolluted river water flows in. It gathers in groups around coral reefs and rock shelters to avoid predators.

日本自然保護協会アクアマリンふくしま

Basic data

Range
Yakushima, Amami Oshima, Ishigaki Island, Iriomote Island, Philippine Islands, Kalimantan, and elsewhere
鳥羽水族館

Where the Redspot cardinalfish has been recorded

World map with dots where the Redspot cardinalfish 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

Where it livesJapanAsiaOcean

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
小天竺鲷
繁體中文
小天竺鯛
Português (Brasil)
Cardeal-de-pinta-vermelha

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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