Photos of Mexichromis porterae

July 26, 2005
From: Amber Thweatt

I've been reading seaslugforum for quite some time now, and until today I've never posted anything. I am also addicted to taking seaslug photos. I was very excited on Saturday during a dive at Catalina Island to have my first sighting of a Mexichromis porterae. I think they've been alluding me because I didn't realized how small they were. This particular species was about 1-1.5 cm in length. I thought you might enjoy seeing the photos.

Locality:  Catalina Island (Dead Man's Reef), California, USA. Depth: 30 feet. Length: 1 cm. 23 July 2005. Kelp Reef. Photographer: Amber Thweatt


Thweat, A., 2005 (Jul 26) Photos of Mexichromis porterae. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Amber,
What a spectacular way to make a debut on the Forum! It is indeed a beautiful animal. Sorry I didn't have a size indication on the Fact Sheet - which I have now added. Dave Behrens (1991) notes that it grows to 35 mm in length
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Jul 26). Comment on Photos of Mexichromis porterae by Amber Thweatt. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

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