brittle star

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Related to Brittle stars: Feather stars, Sea lilies

brittle star

any member of the Class Ophiuroidea - Echinoderms which possess usually five slender arms, clearly distinct from the central disc which lacks an anus. The number of arms is more variable than in starfish Class ASTEROIDEA.
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For example, molecular work within the brittle star species Ophiura lymani identified successful radiations out of the Southern Ocean into South America, albeit only during the Pleistocene (Sands et al.
There is little information in correlation with anti-cancer activities of brittle star.
Set on the lee side of the dunes, the brittle stars take advantage of their elevated position for feeding.
Similarly, high-density aggregations of brittle stars and brachiopods in boulder-cobble areas and fields of sea pens and sea urchins in sand and mud habitats also may provide space and structure for other organisms (e.
Brittle stars were removed from the substrate, counted, and the volume of the substrate was estimated by measuring displacement volume.
When it comes to spotting predators, one brittle star is all eyes.
We meet the angler fish who provides his own light source and lure for prey, the brittle stars which live up to four miles below the water surface, and learn how even the mighty sperm whale inhabits these deep reaches despite his need for air.
The bottom photo shows a small octopus sharing its holdfast home with some red, bristly brittle stars.
Methods: To extract polysaccharide, dried brittle stars were ground and extracted mechanically.
Undamaged, older larvae of sea stars and brittle stars (as well as other echinoderms) sometimes clone themselves.
Instead of healthy-looking brittle stars draping the corals' branches, the scientists also noticed uncharacteristically white brittle stars tightly coiled around the branches of the corals.
Antarctic clams, snails and brittle stars, because of adaptation to their environment, have soft shells and have never had to fight shell-crushing predators.