Moridilla brockii from sthn Queensland

November 26, 2008
From: Gary Cobb

Concerning message #21982:

Hi Bill and everyone!
During David Mullins and I 2 hour dive at the north west side the Flinders Reef north or Moreton Island we found under two rocks Moridilla brockii.
You can see the extra long rolled cerata which are white in these animals. They do unroll and thrash aroud when disturbed!

Locality: Flinders Reef, Moreton Island, 16 m, Queensland, Australia, Pacific Ocean, 15 November 2008, Subtidal. Length: 50-55 mm. Photographer: Gary Cobb and David Mullins.


Cobb, G.C., 2008 (Nov 26) Moridilla brockii from sthn Queensland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Thanks Gary & Dave,

Glad you saw the classic 'cerata waving' - it can be quite a spectacular display which we hypothesise is a defensive display.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Nov 26). Comment on Moridilla brockii from sthn Queensland by Gary Cobb. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Moridilla brockii

Related messages

  1. Moridilla brockii from Philippines
    From: Marcel Tanke, October 22, 2008
  2. Moridilla brockii from Komodo
    From: Natasja Vandeperre, April 22, 2008
  3. Re: Colour form of Cuthona yamasui
    From: Samson Tan, February 22, 2008
  4. Moridilla brockii eggs from Ningaloo
    From: Kristin Anderson, February 28, 2006
  5. Moridilla brockii from northeastern Australia
    From: Daniel J. Foote, October 6, 2005
  6. Moridilla brockii from Bali
    From: Douglas Hansen, May 31, 2005
  7. Moridilla brockii from NW Australia
    From: Steven Tuften, July 26, 2002
  8. Moridilla brockii from Western Australia
    From: Drew Taylor, October 2, 2000
  9. Moridilla brockii from Maldives
    From: Erwin Koehler, October 22, 1999

Show factsheet and all related messages