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Echinus is a genus of sea urchins.Sea urchins are echinoderms that are typically spherical or flattened with a covering of spine-like structures. Sea urchins tend to be important members of their ecosystems by grazing on other organisms and stabilizing populations.
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]
Echinus esculentus, the European edible sea urchin or common sea urchin, is a species of marine invertebrate in the Echinidae family. It is found in coastal areas of western Europe down to a depth of 1,200 m (3,900 ft). [3] It is considered "Near threatened" in the IUCN Red List of Threatened Species. [1] Test of Echinus esculentus
Echinus melo, melon sea urchin, is a species of sea urchin in the ... The melon sea urchin is found in the Mediterranean Sea and the eastern Atlantic Ocean ...
The species was first described in 1879 as Echinus horridus by the American zoologist Alexander Agassiz, after being dredged from the deep seabed during the Challenger expedition of 1872–1876. In 1942, it was allocated to the newly erected genus Dermechinus by the Danish zoologist Ole Theodor Jensen Mortensen, a specialist in sea urchins. [1]
Echinus tylodes is a species of sea urchin in the Echinidae family. It is white with rather sparse pink spines, and is endemic to the eastern coast of North America including the Gulf of Mexico . [ 1 ]
The Echinacea are a superorder of sea urchins. They are distinguished by the presence of a rigid test, with ten buccal plates around the mouth, and solid spines. Unlike some other sea urchins, they also possess gills. The group is a large one, with species found worldwide.
For marine scientists, it was deja vu: Another die-off swept through the region in the 1980s and slashed sea urchin populations by around 98%. Mystery solved: Scientists ID Caribbean sea urchin killer