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Project Noah Nature School
Petrosia sp.
Also known as Finger Sponge, this marine creature feeds on plankton, and grows to about 20cm in length. Color vary.
Found on coral and rocky reefs on slopes and dropoffs, at depths of 10 to 20m. Widespread in the Indo-Pacific region.
Spotted this at an as-yet unnamed dive site, off the western coast of Samal Island, Davao, Philippines. It was at about 60 feet depth.
Spotted on Jan 31, 2012
Submitted on Feb 1, 2012
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