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)

Stony sea urchin
(Paracentrotus lividus)

Red sea urchin
(Mesocentrotus franciscanus)

Violet sea urchin
(Sphaerechinus granularis)

West Indian sea egg
(Tripneustes ventricosus)

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Wednesday, November 19th 2025

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Tenerife, the largest of the Canary islands, is a volcanic gem in the Atlantic ocean. It boasts an incredible variety of landscapes, from golden or black sand beaches to the subtropical forests of the Anaga mountains and the majestic Teide volcano, Spain's highest peak. With its picturesque villages, rich local culture and countless outdoor activities, Tenerife is a perfect destination for every type of traveler.

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Located in the English Channel off the northern coast of Brittany, just a few kilometers from the town of Roscoff, Batz island is a true little haven of peace where you can enjoy its wild landscapes, unspoiled beaches and historical heritage.

Photo of the Day

Requin cuivre
(Carcharhinus brachyurus)