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The red sea urchin (Mesocentrotus franciscanus) [1] is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California.It lives in shallow waters from the low-tide line to greater than 280 m (920 ft) deep, [2] and is typically found on rocky shores sheltered from extreme wave action in areas where kelp is available.
It is one of the few sea urchin that can survive many hours out of water. [45] Sea urchins can be found in all climates, from warm seas to polar oceans. [40] The larvae of the polar sea urchin Sterechinus neumayeri have been found to use energy in metabolic processes twenty-five times more efficiently than do most other organisms. [46]
Radiols (spikes) of a "slate pencil sea urchin". They are a classical souvenir. This species is a large sea urchin, crapping in some specimens reaching over 8 cm in diameter, with spikes up to 10 cm. Most specimens are bright red, but brown and purple colorations are also seen. [3] The spines may have a different color from the body.
Light from a remotely operated vehicle reveals a “huge” crowd of sea urchins, gathered in the dark roughly 1,350 feet below the surface, all wearing “hats,” made of debris, on the tops of ...
Sea urchins in Israel's Gulf of Eilat have been dying off at an alarming rate, researchers announced Wednesday — a development that threatens the Red Sea’s prized coral reef ecosystems.
Diadema setosum is a widely distributed species of sea urchin. Its range stretches throughout the Indo-Pacific basin including Malaysia, [7] longitudinally from the Red Sea and then eastward to the Australian coast. Latitudinally, the species can be found as far north as Japan and its range extends as far south as the southern tip of the ...
Asthenosoma marisrubri ('flexible body of the Red Sea'), aka Red Sea fire urchin and toxic leather sea urchin , is a relatively common sea urchin with a widespread distribution in the Indo-Pacific, and was till 1998 considered a color variant of Asthenosoma varium.
Red heart urchins burrow at the rate of 3 to 6 centimetres (1.2 to 2.4 in) an hour during the day and twice as fast as this at night. [3] In 1997, an epizootic event involving the red heart urchin occurred off the coast of Curaçao. It was established that the causative agent was a species of bacterium, Pseudoalteromonas. Affected urchins lost ...