Atys ? from Tonga

March 15, 2001
From: Don Barclay

Hello Bill,
Here is a pic of what I have been calling Atys cylindrica. It was collected the night of 19 February 2001 on a sand slope with grass, five meters deep, on the east side of Vava'u, Tonga. When touched, the animal unfurled the flaps on its head and attempted to swim away.

This one doesn't look exactly like the beautiful pic of A. cylindrica that you posted on the Forum. Is it the same species?

The shell measured ~12mm long, though I have found shells there that are very similar but quite a bit larger, around 25mm.

Thanks again,

Barclay, D., 2001 (Mar 15) Atys ? from Tonga. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Don,
I don't think it is Atys cylindrica, but because these species are normally studied as 'shells' we normally need to have a look at the shell to be sure. Perhaps Clay Carlson, with his vast knowledge of these 'shells' as animals, will be able to give some advice
Best wishes,
Bill Rudman


Atys sp. 1

Related messages

  1. Re: Don's Shell
    From: Clay Carlson , March 27, 2001
  2. Re: Atys ? from Tonga
    From: Don Barclay, March 20, 2001

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