Re: Colour variation in Dirona albolineata

August 24, 2007
From: Dave Washburn

Concerning message #16456:

My daughter and I found this Dirona albolineata on the barge at Salt Water State Park in Puget Sound. I got extremely excited because I thought it was a Golden Dirona, which we had never seen before. I was so sure I didn't bother to consult Dave Behrens' book until someone on another forum pointed out my mistake. Oh well, that's what I get for assuming. I had no idea these guys could develop such an intense orangish color. It was amazing.

Locality: Salt Water State Park, 40 ft, Washington, USA, Puget Sound, 15 August 2007, Found on the side of a piece of old wreck. Length: 2.5 inches. Photographer: Malinda Washburn.

Dave Washburn

dwashbur@nyx.net

David L. Washburn, 2007 (Aug 24) Re: Colour variation in Dirona albolineata. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20504

Dear Dave,

No problem, we have all made a miss-ID or 20 in our lives. Yes, this Dirona is quite variable in ground color as show in Andy & Bernie's new book. You were obviously thrown off as your specimen just happens to be really dark. In the future, the main external cues are that Dirona albolineata has a bright white line connecting the tips of the rhinopores (most obvious between the bases of the rhinophores), and a white line along the edge of the foot (most specimens, not yours here) and frontal veil (all specimens). Dirona pellucida has neither. And, keep that book handy.

Thanks for sharing,
Dave Behrens

Behrens, D.W., 2007 (Aug 24). Comment on Re: Colour variation in Dirona albolineata by Dave Washburn. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20504

Factsheet

Dirona albolineata

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