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  2. Sea urchin - Wikipedia

    en.wikipedia.org/wiki/Sea_urchin

    The coast of Southern California is known as a source of high quality uni, with divers picking sea urchin from kelp beds in depths as deep as 24 m/80 ft. [85] As of 2013, the state was limiting the practice to 300 sea urchin diver licenses. [85]

  3. Pseudocentrotus depressus - Wikipedia

    en.wikipedia.org/wiki/Pseudocentrotus_depressus

    Pseudocentrotus depressus, commonly known as the pink sea urchin, [2] is a species of sea urchin, one of only two species in the genus Pseudocentrotus.It was first described in 1864 by the American marine zoologist Alexander Agassiz as Toxocidaris depressus, having been collected during the North Pacific Exploring and Surveying Expedition undertaken by Captain Cadwalader Ringgold and later ...

  4. Strongylocentrotus droebachiensis - Wikipedia

    en.wikipedia.org/wiki/Strongylocentrotus...

    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. The species name "droebachiensis" is derived from the name of the town Drøbak in Norway.

  5. Mysterious plague is wiping out sea urchins across the globe ...

    www.aol.com/mysterious-plague-wiping-sea-urchins...

    Expert warns urchins vital to coral reef ecosystems now ‘functionally extinct’ in Red Sea Mysterious plague is wiping out sea urchins across the globe, scientists say Skip to main content

  6. Heterocentrotus - Wikipedia

    en.wikipedia.org/wiki/Heterocentrotus

    Heterocentrotus are brightly colored tropical sea urchins with very thick spines that have given them the nickname "slate pencil urchins", named after slate pencil.. The genus consists of sea urchins with rounded (but slightly elliptical) test , with the peristome (mouth) located in the center of the oral surface (lower) and the periproct at ...

  7. Heterocentrotus mamillatus - Wikipedia

    en.wikipedia.org/wiki/Heterocentrotus_mamillatus

    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.

  8. Sea urchin die-off threatens reefs from Florida to Caribbean ...

    www.aol.com/news/sea-urchin-die-off-threatens...

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  9. Diadematidae - Wikipedia

    en.wikipedia.org/wiki/Diadematidae

    The Diadematidae are a family of sea urchins. Their tests are either rigid or flexible and their spines are long and hollow. [2] Astropyga Gray, 1825 Astropyga radiata (Leske, 1778), extant; Astropyga pulvinata (Lamarck, 1816), extant; Astropyga magnifica (Clark, 1934), extant; Centrostephanus Peters, 1855 Centrostephanus asteriscus (Agassiz ...