Opisthobranch of the Week Data
Phyllidiella sp. 1 is considered to be very rare in the water's of Okinawa's main island as I have seen and collected only the above two individuals. The two specimens were collected, along with the sponge upon which they were found, in an area of mixed sand and coral rubble from 55m during a mid-morning SCUBA excursion. I've added a second image showing the two phyllidiids and their host(?) sponge from which they were collected.
There's an image of a similar appearing animal, Phyllidiella lizae, from Central Sulawesi posted on the Sea Slug Forum with comment by Rudman (2007). In reference to the two Okinawa animals, Terry Gosliner (pers. comm.) feels that they are not P. lizae in as much as the tubercles are not pronounced enough. In as much as Terry isn't certain as to what they are, I'll leave them as Phyllidiella sp. 1.
In addition to the above featured Phyllidiella sp. 1, I've previously featured on these pages four described Phyllidiella species found in Okinawan waters. The four Okinawan species are: