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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 savignyi (Michelin 1845), a Long-Spined Sea Urchin. Indo-Pacific; Africa to the South Pacific. Test about five inches maximum diameter, with spines to sixteen. Black, grey, brown in color. Have green to blue lines in their interambulacral aborally (on top). Lack the orange ring around the anus of D. setosum (below). Hide in shade by day, scouring the reefs by night. Blue ring around anus is indicative of this species. A frequent contaminant on/in live rock imports. Philippines one shown. Painful to get stuck by... S. Leyte 2013
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