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Project Noah Nature School
Hydatina physis
A large, mostly dark purple sea slug with bluish edges and a lightly calcified shell. Sometimes found washed up in tide pools but mostly found on coral reefs. Highly specialized predators that feed specifically on cirratulid polychaete worms.
A tide pool in Collaroy, NSW, Australia
Spotted on Jan 4, 2014
Submitted on Jan 7, 2014
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