I hope you can ID for me. Dear Ron, Although it has no sign of a shell, the single siphon or tube, which you can see at the left of your picture, suggest that this is a velutinid , which are a family of marine snails with flattened internal shells. Best wishes, Bill Rudman. Comment on Velutinid from Port Stephens by Ron Greer. Dear Akos, No this is Mystaconcha wilsoni which is illustrated on the bottom left of the Velutinid Page .
Many species are very well camouflaged on the ascidian colonies on which they feed.
Best wishes, Bill Rudman. Comment on Velutinid from southern New South Wales by Akos Lumnitzer. I found it several times throughout the year except in winter. Oct 2nd 1999, depth 15m, on rock. Thanks lot to share your time for me.