Heterocentrotus trigonarius

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pencil urchin
Heterocentrotus trigonarius Réunion.JPG
Scientific classification
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Echinoida
Family: Echinometridae
Genus: Heterocentrotus
Species: H. trigonarius
Binomial name
Heterocentrotus trigonarius
(Lamarck, 1816)

Heterocentrotus trigonarius, commonly known as the slate pencil urchin or red slate pencil urchin, is found in the tropical waters of the Indo-Pacific region.

Heterocentrotus mamillatus is a similar, related species.

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