Dendronotus subramosus from Monterey, California

January 27, 2006
From: Clinton Bauder

Hi Bill,

This critter was on the same hydroid as the Dotos in my earlier message [#15117 ] but it fell off during the photo shoot so the pictures aren't on the presumed food item.

Locality: Monterey Breakwater, California, USA. Depth: 10 meters. Length: 20 mm. 22 October 2005. Hydroid on a rocky breakwater. Photographer: Michael Jimenez

Since my previous messages proved I can't tell Dendronotus subramosus and D. frondosus apart I'm reluctant to make a definitive statement but I have a hunch this one might be D. subramosus. The rhinophores are smooth all the way out to the crown at the end and I think the hydroid is the right food source. In any case we shot this guy at several different angles so hopefully the pictures provides the details needed for ID. Photos were taken by my friend Mike Jimenez.


Bauder, C., 2006 (Jan 27) Dendronotus subramosus from Monterey, California. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Hi Clinton,
Well I would definitely have to go with Dendronotus subramosus MacFarland, 1966.  The smooth body, smooth rhinophores and branched processes on the frontal veil are perfect.  The color of Mike's specimen is also very characteristic.
Best wishes,
Dave Behrens

Behrens, D.W., 2006 (Jan 27). Comment on Dendronotus subramosus from Monterey, California by Clinton Bauder. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Related messages

  1. Dendronotus subramosus at work
    From: Jan Kocian, June 4, 2007
  2. Mystery slug from Cannon Beach, Oregon
    From: Minette Layne, January 12, 2007
  3. Dendronotus subramosus - Take 2
    From: Clinton Bauder, September 15, 2005
  4. Dendronotus subramosus? from California
    From: Sean Kearney, March 23, 2004
  5. Mystery slug is Dendronotus subramosus
    From: Dave Behrens, August 9, 2003
  6. Unknown nudibranchs from California
    From: Bruce Wight, December 7, 2001
  7. Nudibranch from British Columbia
    From: Andy Murch, July 8, 2001

Show factsheet and all related messages