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''Morula (Morula) granulata'', common name the mulberry shell, is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails. ==Description== The shell size varies between 18 mm and 30 mm. The conical, oblong shell is compact and contains no varices. It is covered with dark brown to black blunt knobs on a white background with spiral cords between the rows. The body whorl is covered with six rows of nodules. The outer lip is dentate with four to five teeth within. The narrow aperture is blackish. The columella and the inner lip are white.〔 This globular shape, tight shell coiling, strong sculpture, a dentate outer lip and narrow aperture offers an added protection against shell-crushing predators, such as fishes and crabs. This mollusc is a predator and feeds by drilling sedentary or semi-mobile prey. It eats only other molluscs, mainly gastropods of the genera ''Cerithium'', ''Rissoina'', ''Heliacus'', and ''Bittium'', and the mussel ''Hormomya''. Imposex in ''Morula granulata'' is a bioindicator for the presence of tributyltin (TBT) contamination (an anti-fouling paint for boats which affects females of the species). 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「Morula granulata」の詳細全文を読む スポンサード リンク
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