White-and-Orange-Tipped Nudibranch

Antiopella fusca

Summary 5

Antiopella fusca is a species of sea slug, or more accurately a nudibranch, a marine opisthobranch gastropod mollusk, in the family Proctonotidae.

Description 5

The bodies of nudibranchs in this species are semi-translucent. The body is covered in short cerata. In Antiopella fusca the cerata are orange and white tipped.

Distribution 5

The species Antiopella fusca is found from the Kenai Peninsula, Alaska to central California and also in northern Japan.

Habitat 6

This species of nudibranch is found in shallow and subtidal waters.

Life habits 5

Antiopella species feed on Bryozoa.

Predators 5

In California, Navanax is a known predator of Antiopella. Navanax tracks the slime of Antiopella by using chemoreceptors. When Antiopella is about to be caught, it rolls into a ball, leaving its cerata exposed. If there is a water current, as if often the case, the sea slug may then be passively rolled away from the predator.

Sources and Credits

  1. (c) Robin Gwen Agarwal, some rights reserved (CC BY-NC), https://www.inaturalist.org/photos/8993018
  2. (c) Minette Layne, some rights reserved (CC BY-SA), http://www.flickr.com/photos/minette_layne/3662090360/
  3. (c) matt knoth, some rights reserved (CC BY-NC-ND), http://www.flickr.com/photos/mattknoth/3682179067/
  4. (c) Phil Garner, all rights reserved, https://www.inaturalist.org/photos/9684893
  5. Adapted by Robin Gwen Agarwal from a work by (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Janolus_fuscus
  6. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Janolus_fuscus

More Info

iNat Map

Color orange, white