January 5, 2002
From: Bernard Picton
To accompany my photos of Berthella plumula here us some feeding information.
It seems to feed on the sponge we call Oscarella lobularis (actually the Oscarella in the British Isles is probably a new species, distinct from the Mediterranean O. lobularis). The
appearance of Berthella seems to be providing camouflage on Oscarella, with a central transparent patch mimicking an oscule of the sponge and the
reticulate pattern looking similar to lobules of the sponge. Thompson (1984)
suggests that Berthella plumula may feed on tunicates so I was interested to
see on the Forum that Berthella ocellata feeds on Plakina, as this is quite closely related to Oscarella.
The upper photo is of the sponge Oscarella lobularis - Blasket Is., Co. Kerry. The lower photo is of a group of Berthella from St. Kilda, Scotland, July, 1984.
firstname.lastname@example.orgPicton, B.E., 2002 (Jan 5) Food of Berthella plumula. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/5894
Re: Berthella sp ? from Mediterranean
From: Juan Lucas Cervera, April 20, 2005
Berthella sp ? from Mediterranean
From: Sylvie Grall, April 18, 2005
Berthella plumula from the British Isles
From: Bernard Picton, January 5, 2002
Berthella plumula from Scotland
From: Jim Anderson, December 13, 2001