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Sand star : ウィキペディア英語版
Sand star

The sand star, ''Luidia foliolata'', is a species of starfish in the family Luidiidae found in the northeastern Pacific Ocean on sandy and muddy seabeds at depths to about .
==Description==
The sand star has a small disc and five long, flattened arms with tapering tips. It can grow to a diameter of , and is a grey, greenish-grey, or pale brown colour, sometimes speckled with white. The arms have rows of large marginal plates, each with several spines, but these are not visible from the aboral (upper) side. The tube feet have no suckers, but instead end with blunt points. The sand star could be confused with ''Astropecten verrilli'', but in that species, the large marginal plates are visible from above.〔(【引用サイトリンク】title=''Luidia foliolata'' Grube, 1866 )〕 This starfish seems to be easily damaged, and often breaks in pieces if raised from the seabed by trawling.〔 Even when brought up intact, it often has missing or regenerating arms, perhaps the result of attacks by predatory crabs or fish.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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