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Question
Which one is a sedentary echinoderm?
Which one is a sedentary echinoderm?
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Solution
The correct option is D Antedon
Antedon also known as feather star has ten thin pinnate arms with side-branches like a feather. There are about 25 short cirri arising around the central plate on the underside of the disc which curls under to anchor the animal to the substratum. Feather star is a sedentary deep-sea echinoderm. It is fixed to the ocean floor by cirri and feeds on microscopic plankton and debris. So, the correct answer is option D.
Antedon also known as feather star has ten thin pinnate arms with side-branches like a feather. There are about 25 short cirri arising around the central plate on the underside of the disc which curls under to anchor the animal to the substratum. Feather star is a sedentary deep-sea echinoderm. It is fixed to the ocean floor by cirri and feeds on microscopic plankton and debris. So, the correct answer is option D.
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