(Quoy & Gaimard, 1833)
Found throughout the Indo-West Pacific.
Fingal Bay, Port Stephens, New South Wales, Australia. May 1993. in rock pool, 3 specimens, 23-27mm long alive. - The green on the shell is caused by a fine layer of microscopic green algae. Small tufts of filamentous algae are also growing on the anterior part of the shell. PHOTO: Bill Rudman.
Most species of the Haminoea are translucent with brown, grey and white mottling. Species are found throughout tropical and temperate seas, and often occur in very large populations. Haminoea cymbalum is characterised by the bright orange spots and diffuse purple markings on the translucent greenish body. Sometimes either the orange or purple may be absent but animals are usually clearly identifiable.
All species of Haminoea are herbivorous, grinding their algal food, usually filamentous green species, but sometimes the Sea-lettuce Ulva, or the unicellular algal film which settles on the sandy-mud surfaces on which Haminoea is often found.
See Clay Carlson & Patty Jo Hoff's message below with pictures from Guam and the suggestion that this should be called Haminoea simillima.
Compare with four other orange spotted species, Haminoea ovalis, Haminoea sp. 1., Haminoea sp. 2. and Haminoea sp. 3.
See Carlson & Hoff's message discussing the 5 orange-spotted species.
• Rudman,W.B.,1971. Structure and functioning of the gut in the Bullomorpha (Opisthobranchia). Part 1. Herbivores. Journal of Natural History, 5: 647-675.
• Rudman,W.B.,1971. On the opisthobranch genus Haminoea Turton & Kingston. Pacific Science, 25: 545-559.
Rudman, W.B., 1999 (March 18) Haminoea cymbalum (Quoy & Gaimard, 1833). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/hamicymb
Mass spawning in Haminoea cymbalum
From: Philibert Bidgrain, February 16, 2007
Haminoea cymbalum from the Cook Islands
From: Marcus Coltro, May 26, 2006
Trailing in Haminoea cymbalum from Reunion Island
From: Philibert Bidgrain, October 18, 2005
Haminoea cymbalum from Christmas Island
From: W.B. Rudman, May 8, 2002
Haminoea? from the Philippines
From: Erwin Koehler, June 14, 2001
Sesquiterpene molecule from Haminoea cymbalum
From: Brett Baker, April 15, 2001
Haminoea cymbalum in southern Queensland
From: John Bodman, June 29, 2000
Re: Haminoea cymbalum in aquaria
From: Nathan Cope, August 19, 1999
Keeping Haminoea cymbalum in aquaria
From: Nathan Cope, August 17, 1999
Food of Haminoea cymbalum
From: Clay Carlson, March 24, 1999
Re: Haminoea cymbalum & H. simillima
From: C. Carlson & P.J. Hoff, March 21, 1999
Haminoea cymbalum? from Sulawesi
From: Lindsay Warren, March 18, 1999