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A thin and fragile, smooth glossy shell. White with black spiral lines. The animal is pink with a large frilly mantle with blue egdes. It can retract into the shell, but is quite slow in doing so. Size: 25mm
On intertidal rock flats & rock pools.
Hydatina physis is a sea slug species. This species is extremely widespread. It is found in tropical waters of the Atlantic, Pacific, and Indian oceans. Hdyatina physis grows to a length of up to 1.5 inches (3.8 cm.). The shell is thin and is partly covered by parapodia (fleshy flaps). The diet of Hydatina physis is very specialized; it feeds on polychaete worms. From January to May Hydatina physis is frequently found on shallow reef flats. It is most often seen at night.
Spotted on Mar 7, 2013
Submitted on Mar 7, 2013