Slate pencil urchin
Amazing fact
The slate pencil urchin has sturdy spines with rounded tips.
Universidade Estadual do Paraná
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An illustration based on the real animal.
A little discovery to share.
The slate pencil urchin has sturdy spines with rounded tips.
THE REAL WORLD
The real Slate pencil urchin
- Scientific name
- Eucidaris tribuloides
- Japanese name
- タイセイヨウマツカサウニ
- Group
- Ocean animals
- Class
- Echinoidea
- Order
- Cidaroida
- Family
- Cidaridae
- Genus
- Eucidaris
During the day, it hides in rock crevices, propping itself up on its big spines.
How the Slate pencil urchin lives
It releases eggs and sperm into the water, where fertilization takes place. Early in life, it spends a period drifting in the water as plankton. Later, it settles on the seabed and continues to develop.
Universidade Estadual do ParanáBasic data
- Diet
- Corals and sponges
- Range
- The Atlantic Ocean and Caribbean Sea
Where the Slate pencil urchin 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
- タイセイヨウマツカサウニ
- 简体中文
- 石笔海胆
- 繁體中文
- 石筆海膽
- Español
- Erizo lápiz
- Français
- Oursin-lance antillais
- Português (Brasil)
- Ouriço-satélite
- Italiano
- Riccio matita ardesia
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 — タイセイヨウマツカサウニChecked: 2026-11-04
- Universidade Estadual do Paraná — Ouriço-satélite (Eucidaris tribuloides)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.
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