Eubranchus exiguus from Massachusetts, USA

July 22, 2003
From: Alan Shepard

Bill -
I've attached a couple of photos of what I believe is Eubranchus exiguus. The photos were taken at Folly Cove in Gloucester, Massachusetts, USA.

The first photo [upper right, lower left] with the pair on a hydroid was taken in approximately 10m of water. These were tiny individuals, no more than 5mm long. Water temperature was approximately 6c.

The second photo [lower right] is of a larger individual, nearly 10mm long. It was taken in shallower water, maybe 5m. In this photo you can make out some of the internal structure of the sea slug.
Alan Shepard
Tolland, CT, USA

Dear Alan,
With the proviso inherent in Bernard Picton's message I would agree that this is most probably Eubranchus exiguus.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (Jul 22). Comment on Eubranchus exiguus from Massachusetts, USA by Alan Shepard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Eubranchus exiguus

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