brittle star

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Related to Brittle stars: Feather stars, Sea lilies

brittle star

[¦brid·əl ′stär]
(invertebrate zoology)
The common name for all members of the echinoderm class Ophiuroidea.
References in periodicals archive ?
Set on the lee side of the dunes, the brittle stars take advantage of their elevated position for feeding.
These ancient communities eventually declined because of the diversification of predators, and it is due to this predation pressure--mainly from fishes--that modern brittle stars tend to be cryptic, generally emerging at night to feed.
However, unlike nocturnal feeding by brittle stars in shallower water, a behaviour that avoids daytime visual predators that graze the arms, O.
The brittle stars do, however, still exhibit the defensive self-mutilation characteristic of other brittle stars, casting off their arms when harassed.
Moreover, the vast majority of these organisms were other invertebrates, including crinoids, sponges, crabs, basket stars, brittle stars, seastars, anemones and salps.
The most common structure-forming invertebrates (98% of total) included the crinoid Florometra serratissima (40%), the brittle star (Ophiacantha spp.
Criteria Taxa n Size Complex morphology Black coral 135 X X (Antipathes dendrochristos) Flat sponge 4240 X Barrel sponge 2138 X Vase sponge 1167 X Sea pen 9726 X (Subselliflorae) Basket star (Gorgonocephalus eucnemis) 733 X X White-plumed anemone 57 X (Metridium farcimen) Foliose sponge 1259 X Shelf sponge 139 X Gorgonian 27 X (Gorgonacea) Crinoid 174,231 X (Florometra serratissima) Brittle star (Ophiuridae) 207,667 Fragile sea urchin 18,363 (Allocentrotus fragilis) White sea urchin 45,092 (Lytechinus anamesus) Brachiopod 56,924 (Order Terebratulida) Density (no.
Brittle stars were removed from the substrate, counted, and the volume of the substrate was estimated by measuring displacement volume.
Divide and broadcast: sexual reproduction in the West Indian brittle star Ophiocomella ophiactoides and its relationship to fissiaprity.
I'd never seen this kind of posture in brittle stars anywhere among the dozens of other coral sites in the Gulf, never seen this coloration before," he said.
That's the conclusion of a 14-year study of sea cucumbers, brittle stars, and other mobile bottom dwellers off the California coast, says Henry A.
Sponges, cnidarians, and brittle stars all include sex changers, too.