Ceratosoma miamirana from Heron Island

February 19, 2007
From: Julie Marshall


Dear Bill,

Following the photos of the very brightly coloured Ceratosoma miamirana from Indonesia [message # 19458 ] attached are photos of a more usual colour form of this species from Heron Island [Great Barrier Reef]. The photo of the ventral side of the animal clearly shows the blue iridescent spots. It was found crawling over coral sand in a pool near the reef crest at low tide.

Locality: Heron Island, 1 m., Queensland, Australia, Pacific Ocean, January 1993, Intertidal. Length: 80 mm. Photographer: Julie Marshall.

Best wishes,
Julie Marshall

juliemarshall@netspace.net.au

Marshall, J.G., 2007 (Feb 19) Ceratosoma miamirana from Heron Island. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19485

Thanks Julie,
This species can be very well camouflaged. Yours looks very like an overgrown sponge colony, the dark pits along each side looking like the oscules [siphons] of a sponge. Both the very scalloped mantle edge, and these greenish pits, are two characteristic features of the mantle which link your 'normal' animal to the reddish one you have mentioned, and also to the whitish specimen from Guam [message #19470]. Of course if we could just turn the photos over I am sure they would both have the green network on the underside, which is shown so well in your photo.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Feb 19). Comment on Ceratosoma miamirana from Heron Island by Julie Marshall. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19485

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