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大连紫海胆成体在自然海区摄食的饵料,包括多种大型海藻类、底栖硅藻类、某些小型贝类及有机碎屑等,其中以海带、石莼等海藻类为主。调查与试验结果还表明,成海胆摄食的饵料与其生活水域的饵料生物种类有关。当饵料生物丰富时,成海胆对饵料的摄食有一定的选择性。对绿藻,红藻、褐藻这三大类海藻,其选择率的大小依次为褐藻、红藻、绿藻。褐藻中以对裙带菜、海带等最为嗜食;红藻中嗜食角叉藻、石花菜;绿藻中嗜食石莼、浒苔等。对于某些动物性饵料,如鱼和贝类的碎肉等,成海胆也有良好的摄食习性。因而,成海胆的食性应属杂食性。
Dalian purple sea urchin adult feeding in the natural sea food, including a variety of large seaweed, benthic diatoms, some small shellfish and organic debris, of which kelp, stone seaweed and other mainly. Investigation and test results also show that feeding into the sea urchin and feed their living waters species of biological species. When the food organisms rich, into the sea urchin feeding on food has a certain selectivity. On the green algae, red algae, brown algae these three categories of seaweed, the size of their choice of brown algae, red algae, green algae. Brown seaweed in the wakame, kelp and other food-for-the most; red algae eating carrageenan, seaweed; green algae in the diet stone, enteromorpha and so on. For some animal feed, such as fish and shellfish minced meat, into the sea urchins have good feeding habits. Therefore, the feeding of sea urchin should be omnivorous.