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Sea urchins or urchins ( / ˈɜːrtʃɪnz /) are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres (16,000 ft; 2,700 fathoms). [1] .
- Flower Urchin
Toxopneustes pileolus, commonly known as the flower urchin,...
- Wolf Eel
The wolf eel (Anarrhichthys ocellatus) is a species of...
- Sand Dollar
Sand dollars (also known as sea cookies or snapper biscuits...
- Strongylocentrotus purpuratus
Strongylocentrotus purpuratus is a species of sea urchin in...
- Echinus esculentus
Echinus esculentus, the European edible sea urchin or common...
- Red sea urchin
The red sea urchin (Mesocentrotus franciscanus) is a sea...
- Strongylocentrotus droebachiensis
Strongylocentrotus droebachiensis is commonly known as the...
- Flower Urchin
Sea urchins are spiky members of the class Echinoidea of the phylum Echinodermata. Like the rest of the echinoderms, they are entirely marine. They are globe-shaped, and protected by calcareous plates and spines. Urchin is an old word for hedgehog, and in many foreign languages these animals are called sea hedgehogs.
Apr 8, 2024 · Learn about sea urchins, spiny marine animals with a globular body and a radial arrangement of organs. Find out how they feed, move, reproduce, and have poisonous spines and teeth.
- The Editors of Encyclopaedia Britannica
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