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Janthina janthina : ウィキペディア英語版 | Janthina janthina
''Janthina janthina'', common name the common purple snail, is a species of holoplanktonic sea snail, a marine gastropod mollusk in the family Janthinidae, the violet snails or purple storm snails. ==Distribution== This species is found worldwide in the warm waters of tropical and temperate seas, floating at the surface.〔 They are often found in large groups and sometimes become stranded on beaches when they are blown ashore by strong winds. These snails are a unique part of the pleuston, organisms living on or at the very surface of the water, because of their relatively large size. They have veliger or free swimming larvae, but the adults do not swim and cannot create their rafts except at the surface where air bubbles are available.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Janthina janthina」の詳細全文を読む
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