Okenia rhinorma found sthn Queensland

October 28, 2009
From: Gary Cobb


Hi Bill and everyone!
David and I went diving Saturday at a spot we call Coles Hole. The bottom is 21 m and the top of the wall is about 17-18 m. Because we have been away from this spot for a long time we decided to check it out. We found 4 new species to our list which now makes 395.

David and I found an Okenia sp. each at the same time! It is very interesting the way the 6 processes are surrounding the gills and rhinophores. The group is centrally located on the dorsum. The head seems very long.
Note the length of the rhinophores! Do you think they have the same effect as a periscope, searching for scents and movements up high?

Locality: Coles Hole, Inner Gneerings, Mooloolaba, 18 m, Queensland, Australia, Pacific Ocean, 24 October 2009, Subtidal. Length: 8-12 mm. Photographer: Gary Cobb and David Mullins.

Cheers
Gary

gary@nudibranch.com.au

Cobb, G., 2009 (Oct 28) Okenia rhinorma found sthn Queensland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22723

Dear Gary,

This is an interesting find. It is a species I named Okenia rhinorma a couple of years ago. I made the species name up by combining rhin from 'rhinophore' and orma from 'enormous' because of its unusually long rhinophores. Although known originally only from the western Indian Ocean we have since discovered records on the Forum from Indonesia and Japan, so your Queensland find helps to fill in its geographic distribution.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Oct 28). Comment on Okenia rhinorma found sthn Queensland by Gary Cobb. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22723

Factsheet

Okenia rhinorma

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