Opisthobranch of the Week Data
Philinopsis reticulata is considered to be very rare on Okinawa. I've collected only two individuals, the above featured specimen, as well as a second 10mm specimen. The above featured animal was found crawling on a sandy surface, while snorkeling out to the reef edge prior to a mid-morning SCUBA dive. The species has also been photographed by Atsushi Ono in the Kerama Islands and I've added an additional link below featuring Atsushi's Kerama Islands animal.
This species was described by Eliot (1903) from Wasin Island, off Kenya. Bill Rudman (2000) reports in the Sea Slug Forum the species distribution to be the Tropical Indo-west Pacific. The species was original described from East Africa and recently reported in the Sea Slug Forum as being found in Indonesia, Australia, and New Caledonia. The above featured animal is very similar to both a melanistic specimen from SE Sulawesi, Indonesia, posted to the Sea Slug Forum by Lindsay Warren (2000), as well as Atsushi's Kerama animal.
There are to date (mid-September, 2011) five species of Philinopsis reported from Okinawan waters. The five are:
Philinopsis falciphallus P. gardineri P. pilsbryi P. reticulata The above featured animal P. speciosa