Flabellina gracilis & F. browni

July 22, 2001
From: Bernard Picton

Hi Bill,

Here is a picture of Flabellina gracilis with a juvenile F. browni - note the F. gracilis is full of mature ovotestis whilst the F. browni is translucent throughout and won't be mature until it nearly twice the size of
F. gracilis. There are differences in the cerata - arrangement, spacing, relative sizes, etc but these are hard to put into words - more 'jizz' as the birdwatchers call it.

Locality: Lough Hyne, Co Cork, Ireland. April 1979

Bernard

bernard.picton.um@nics.gov.uk

Picton, B., 2001 (Jul 22) Flabellina gracilis & F. browni. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4846

Thanks Bernard,
Seeing this photo shows the dangers of attempting to identify nudibranchs from colour photos. In many cases anyone familiar with the living animals will be able to do so quite easily, but in other cases, often when you are least expecting it, the identifier will be easily mistaken. Let this be a caution to anyone who thinks matching 'look-a-likes' in photos is all that is needed to identify a nudibranch.
Best wishes,
Bill Rudman

Rudman, W.B., 2001 (Jul 22). Comment on Flabellina gracilis & F. browni by Bernard Picton . [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/4846

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