Pleurobranchus peroni - Jervis Bay

October 24, 2003
From: Sue Newson


Hi Bill,
Reading the latest message re: Pleurobranchus peroni reminded me of a couple of dives when I came across them.
The first one was at a site called "Dent Rock", a personal favourite of mine [Jervis Bay, New South Wales, Australia].
It is a pile of ballast rock dumped in the late 1800's about 150m from shore. The highest point lies beneath the surface from .5m - 2m with a max depth of 5-7m, tide dependent. This isolated reef is abundent with many various species of marine life, many of which are residents that I am beginning to recognize through repeated sightings. Unfortunately I can't say that about the opistobranchs. Those sightings vary in species and abundance.
The night I saw Pleurobranchus peroni for the first time, there was many different species in large numbers. They also included: Umbraculum umbraculum and Berthellina citrina as well as a few snails. I have attached photo's that I took that night but unfortunately I didn't get a photo of Umbraculum umbraculum due to a fogged lens at the end of the dive.

Dive details:
Site: Dent Rock, Jervis Bay
22 November 2002 9.30pm - 10.30pm
average depth: 3m (where pleurobranchs were found)
Viz 2m in torch light.(good for this spot)
Water temp: 19*C
Low tide

Sue Newson

snewson@shoal.net.au

Newson, S., 2003 (Oct 24) Pleurobranchus peroni - Jervis Bay. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11303

Thanks Sue,
I am sure I don't need to say it, but photos of eggs and feeding are always welcome. I don't know why species of Pleurobranchus seem to occur in quite large numbers and then disappear, but it certainly makes it difficult to plan a study of their natural history
Best wishes
Bill Rudman

Rudman, W.B., 2003 (Oct 24). Comment on Pleurobranchus peroni - Jervis Bay by Sue Newson. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/11303

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Pleurobranchus peroni

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