Pale chub
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An illustration based on the real animal.
A little discovery to share.
Male pale chub develop much larger anal fins than females.
THE REAL WORLD
The real Pale chub
- Scientific name
- Opsariichthys platypus
- Japanese name
- オイカワ
- Group
- Freshwater animals
- Genus
- Opsariichthys
A member of the carp family that lives in the middle and lower reaches of rivers and in lakes and marshes.
In the breeding season, males show bright red and blue-green colors on their sides.
Depending on where it lives, it eats many kinds of food, from tiny algae attached to stones to aquatic insects and insects that fall into the water.
How the Pale chub lives
As small fry, they drift downstream and sometimes reach areas near the river mouth. As they grow into juveniles, they become more likely to move upstream. They lay eggs on sandy, gravelly bottoms in shallow, gently flowing water near the bank.
国立環境研究所 侵入生物データベースBasic data
- Diet
- Attached diatoms, aquatic insects, fallen insects, bottom-dwelling animals and zooplankton
- Range
- Western Korean Peninsula, Taiwan, eastern mainland China, northern Vietnam and Japan
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
- 日本語
- オイカワ
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 国立環境研究所 侵入生物データベース — オイカワChecked: 2026-11-03
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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