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The average adult size is around 50 mm (2 in), but it has been recorded at a diameter of 87 mm (3.4 in). The green sea urchin prefers to eat seaweeds but will eat other organisms. They are eaten by a variety of predators, including sea stars, crabs, large fish, mammals, birds, and humans.
Psammechinus miliaris is a species of sea urchin in the family Parechinidae. It is sometimes known as the green sea urchin or shore sea urchin. It is found in shallow areas of the eastern Atlantic Ocean and the North Sea.
Psammechinus microtuberculatus, also known as the green sea urchin, [2] [dubious – discuss] in the family Parechinidae. [1] It was formerly known as Echinus microtuberculatus , and thought to be of the genus Echinus .
The green sea urchin occurs in tropical waters in the western Atlantic Ocean. The subspecies occupy different geographical areas. L. v. variegatus occurs in the Caribbean Sea, southern Florida, the Yucatán peninsula and northern Brazil but not Barbados while L. v. carolinus is found from North Carolina southwards to the Caribbean Sea and Gulf of Mexico.
Echinocyamus pusillus, commonly known as the pea urchin or green urchin, is a species of sand dollar, a sea urchin in the family Fibulariidae, native to the northeastern Atlantic Ocean and the Mediterranean Sea. It buries itself in gravel or coarse sand at depths down to about 1,250 m (4,000 ft).
Several species of sea urchin share the name green sea urchin: Lytechinus variegatus, also known as the variegated sea urchin; Psammechinus microtuberculatus, occurs in the Atlantic Ocean, Adriatic Sea, Aegean Sea and Mediterranean; Psammechinus miliaris, also known as the shore sea urchin
Sea urchins or urchins (/ ˈ ɜːr tʃ ɪ n z /) 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]
Lytechinus semituberculatus, commonly known as the green hedgehog or green sea urchin, is a sea urchin found in the coast of the Galapagos Islands. [1] It is recognizable by its green coloration. Its conservation status is unknown.