Phyllodesmium magnum Rudman, 1991

Phylodesmium magnum

sub-classs Opisthobranchia > order Nudibranchia > sub-order Aeolidina > family Facelinidae/Glaucidae

a large nudibranch with flattened cerata

Distribution =  widespread Indo-West Pacific
Max size =  to at least 130mm

more info at Sea Slug Forum      more pics at nudipixel