pinnules |
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navigate by keyword : abstract animal anus aquaculture aquarium aquatic arms background beautiful blood body brachials brown caught central color colorful conservation coral crinoid cupshaped detritus diameter echinoderm environment extended feather feeds fish happy himerometra himerometridae life lilly long macro mariculture marine maroon means mouth nature ocean pale photography phytoplankton pinnules rare reach red reddish reef robustipinna saltwater scene sea seastar shrimp side species star starfish sticky substance symbiotic tank tropical undersea underwater usually water wildlife zooplankton |
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Himerometra robustipinna can reach a diameter of about 35 to 40 cm 14 to 16 in. It has a cup-shaped body with 33-62 arms usually ~45 about 20 cm 8 in long, extended out from the central disc. Mouth and anus are both on the upper side of the body. Usually this species has reddish or maroon arms, but it may have yellow or pale brown brachials with maroon pinnules. It feeds on detritus, phytoplankton and zooplankton caught by means of a sticky substance on the arms. |
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