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 Archive 581: Daily Pix FULL SIZE
 (For personal use only: NOT public domain)

(Mmm, right click, add, set as background...)

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 This is the Green Brittle Star of the genus Ophiarachna. This animal is a predatory fish eater. S. Leyte 2013

Filter feeding Ophiuroids sticking their tentacles up to catch food; here in S. Leyte 2013 in abundance.
 
Asthenosoma varium Grube 1866, the Pinhead Sea Urchin. Family Echinothuriidae. Indo-West Pacific; Red Sea to Indonesia. Test size to six inches in diameter; spines to twelve. Nocturnal, not safe kept with other invertebrates. Walks on spines and/or tube feet. Takes all foods. S. Leyte 2013
 
Diadema setosum (Leske 1778), the Hatpin Urchin. Indo-Pacific; Red Sea to South Pacific, Japan. To about four inches in diameter. Useful in coral bearing aquariums as these echinoids avoid their rocks. A frequent "contaminant" on live rock imports. Painful to get stuck by... S. Leyte 2013
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