Barred knifejaw
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An illustration based on the real animal.
A little discovery to share.
Barred knifejaw eggs are colorless, transparent spheres.
THE REAL WORLD
The real Barred knifejaw
- Scientific name
- Oplegnathus fasciatus
- Japanese name
- イシダイ
- Group
- Ocean animals
- Order
- Perciformes
- Family
- Oplegnathidae
- Genus
- Oplegnathus
A fish of wave-battered rocky shores all around Japan. Young fish are often seen in calm water, such as inside harbors.
Young fish have broad black vertical bars that fade as they grow, and some develop a black snout.
It has mortar-like teeth that can crush even the hard shells of shellfish and barnacles.
How the Barred knifejaw lives
It eats animals living on the seafloor as well as seaweed. Its egg-laying season runs from spring into summer.
東京都島しょ農林水産総合センターBasic data
- Diet
- Benthic animals and seaweeds
- Range
- Coastal Japan, South Korea, and Taiwan
Where the Barred knifejaw has been recorded
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
- 日本語
- イシダイ
- 简体中文
- 条石鲷
- 繁體中文
- 條石鯛
- 한국어
- 돌돔
- Español
- Pez perico rayado
- Português (Brasil)
- Perca-papagaio-listrada
- Русский
- Полосатый оплегнат
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 東京都島しょ農林水産総合センター — イシダイChecked: 2026-11-03
- 海遊館 — イシダイ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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