Japanese spineless cuttlefish
Amazing fact
Male and female Japanese spineless cuttlefish can be told apart by the length of their arms.
東京都島しょ農林水産総合センター
No sign-up needed. You can save notes on this device.
An illustration based on the real animal.
A little discovery to share.
Male and female Japanese spineless cuttlefish can be told apart by the length of their arms.
THE REAL WORLD
The real Japanese spineless cuttlefish
- Scientific name
- Sepiella japonica
- Japanese name
- シリヤケイカ
- Group
- Ocean animals
- Class
- Cephalopoda
- Order
- Sepiida
- Family
- Sepiidae
- Genus
- Sepiella
It lives from southern Tohoku southward and in the temperate and tropical western Pacific.
Its Japanese name comes from the way a gland at the rear of its body stains its rear end brown.
How the Japanese spineless cuttlefish lives
It eats shrimp and small fish. In Tokyo Bay, it lays eggs near places such as Tomioka and Omori.
東京都島しょ農林水産総合センターBasic data
- Range
- South of southern Tohoku and temperate and tropical waters of the western Pacific
Where the Japanese spineless cuttlefish 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
- シリヤケイカ
- 简体中文
- 日本无针乌贼
- 繁體中文
- 日本無針烏賊
- 한국어
- 쇠갑오징어
- Español
- Sepia inerme Japonesa
- Français
- Sépia inerme Japonaise
- Português (Brasil)
- Choco-japonês
- Italiano
- Seppia del Pacifico
- Русский
- Сепиелла японская
Names come from Wikidata and iNaturalist records. Where a language has no recorded name, we use the scientific name.
Sources and how we check
- 鳥羽水族館 — シリヤケイカChecked: 2026-11-04
- 東京都島しょ農林水産総合センター — 7．東京湾で獲れるコウイカ及びシリヤケイカの生態についてChecked: 2026-11-07
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.
Report a mistakeRELATIVES
Others in Sepiidae
MORE TO MEET
