feather star


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feather star,

common name of a class of echinoderms that, as juveniles, are attached to the sea bottom by a stalk with rootlike branches; the mouth side faces upward. In the adult stage they break away from the stalk and move about freely. Feather stars have water-vascular (ambulacral) systems, similar to those in other echinoderms, that extend into the branched arms on the body, or crown. Some can swim by undulating movements of the arms. Feather stars creep about by means of projections at the base of the crown, called cirri, which can grasp bottom objects. They are marine animals, like all echinoderms, and are widely distributed. They are most common in relatively shallow, warm waters, but some live in cold water and a number of species occur in the ocean depths. Like other members of this class, feather stars may form extremely abundant local aggregations. Feather stars are classified in the phylum EchinodermataEchinodermata
[Gr.,=spiny skin], phylum of exclusively marine bottom-dwelling invertebrates having external skeletons of calcareous plates just beneath the skin. The plates may be solidly fused together, as in sea urchins, loosely articulated to facilitate movement, as in sea
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, class Crinoidea.
References in periodicals archive ?
50pm Lenny is determined to locate the last of the drug trial patients - troubled teen Johnny, whose longsuffering mother Louise (Birds of a Feather star Linda Robson) wants to get to the bottom of her son's behavioural problems.
BIRDS Of A Feather star Linda Robson today made an emotional appeal for tougher penalties for carrying knives after the death of teenager Ben Kinsella over the weekend.
THE teenage son of Birds Of A Feather star Linda Robson cradled a stabbed schoolboy as he lay dying.
Last year the pair did a celebrity special in which they performed make-overs on Top Gear's Jeremy Clarkson and Birds of a Feather star Lesley Joseph.
Satisfied customers include Ready, Steady, Cook chef James Martin (who regularly appears at events on behalf of Underwood), Birds of a Feather star Lesley Joseph and actor Anthony Andrews.
BIRDS of a Feather star Linda Robson has revealed her son Louis had "terrifying panic attacks" after witnessing pal Ben Kinsella's fatal stabbing.
Birds of a Feather star Linda Robson told her: "My advice would be to put something on.
IN her new autobiography, Birds of a Feather star Pauline Quirke says she was never serious about losing weight until the night she got stuck in a hotel bath.
The Eden Court Theatre, Inverness, welcomes Birds Of A Feather star Lesley Joseph for the one and only - wait for it - menopause musical.
In this episode, Birds of a Feather star Linda Robson lands in Japan, where only 3% of people are obese and they live longer, healthier lives than anyone else in the world.
Jenny and her co-stars Dillie Keane, who was part of the cabaret troupe, Fascinating Aida, and Birds Of A Feather star Linda Robson, gripe about everything and anything that gets their goat from the curse of catalogues to the onset of 'invisible woman' syndrome.
The panto follows the traditional tale of Snow White, played by Kathryn RonneyOK, as she is banished from her home after her beauty drives the Wicked Queen Lucretia, played by Birds of a Feather star Lesley Joseph, insanely jealous.