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Slate-Pencil Urchin

Eucidaris tribuloides

(Lamarck, 1816)

Slate-Pencil Urchin

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Summary

Saltwater. Sea Urchins. This urchin cannot be confused with any other in the region. The primary spines are large, but not pointed. The color of the body is light to reddish-brown; the primary spines usually light brown, striped with darker brown, or even marbled with white. Often tinged with green or red. The large spines are often encrusted with algae, bryozoans or even sponges.

To be confused with

- Reef Urchin Echnometra viridis

Characteristics

Size: 2 to 5 cm. Body up to 6 cm. Spines up to 6 cm.
Colour: The colour of the body is light to reddish-brown; the primary spines usually light brown, striped with darker brown, or even marbled with white. Often tinged with green or red.
Shape: The large spines are often encrusted with algae, bryozoans or even sponges.


Habitat environment and ecology

Inhabits reefs. Often found on reefs and rubble areas. It can be found hidden and wedged inside small recesses. In that case, the large spines give it away. Depth: ranges from 3 m down to 25 m.

Distribution range

BES-eilanden: St. Eustatius.

Author

[Marion Haarsma, march 2016]

Literature

- Humann, P., & DeLoach, N. (2002). Reef Creature Identification: Florida, Caribbean, Bahamas (p. 420). Jacksonville (FL): New World Publications.


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Slate-Pencil Urchin

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