Sealife guideThe Camarodonta orderThe taxonomy of marine species
Explore the taxonomy of marine echinoderms with a dedicated focus on starfish and sea urchins !
The class Echinoidea, commonly known as sea urchins, are marine animals characterized by a spherical or slightly flattened body, often protected by rigid spines. These animals, usually small in size, move slowly along the seafloor using tube feet and their internal skeleton is made up of fused calcareous plates.

Slate pencil urchin
(Heterocentrotus mamillatus)
(Heterocentrotus mamillatus)

Stony sea urchin
(Paracentrotus lividus)
(Paracentrotus lividus)

Red sea urchin
(Mesocentrotus franciscanus)
(Mesocentrotus franciscanus)

Violet sea urchin
(Sphaerechinus granularis)
(Sphaerechinus granularis)

West Indian sea egg
(Tripneustes ventricosus)
(Tripneustes ventricosus)
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The California spiny lobster
The California spiny lobster has an elongated body and a hard exoskeleton, usually brown in color with yellow or orange patterns. The California spiny lobster inhabits the temperate waters along the eastern coast of the Pacific Ocean, particularly those of California and the Gulf of California.

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The bigeye trevally
The bigeye trevally has a silver-colored body with, as its name suggests, larger eyes compared to other trevally species. It is distinguished from other trevally species by the slightly yellowish color of its tail.

Monday, April 7th 2025
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Acétabulaire
(Acetabularia acetabulum)
(Acetabularia acetabulum)