Family Proctonotidae Rank Species | Genus Janolus Higher classification Janolus | |
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Similar Janolus, Nudibranch, Dirona albolineata, Cadlinella ornatissima, Janolus barbarensis | ||
Janolus fuscus
Janolus fuscus is a species of sea slug, or more accurately a nudibranch, a marine gastropod mollusk in the family Proctonotidae.
Contents
Janolus fuscus
Distribution
The species Janolus fuscus is found from the Kenai Peninsula, Alaska to central California and also in northern Japan.
Habitat
This species of nudibranch is found in shallow and subtidal waters.
Description
The bodies of nudibranchs in this species are semi-translucent. The body is covered in short cerata. In Janolus fuscus the cerata are orange and white tipped.
Life habits
Janolus species feed on Bryozoa.
Predators
In California, Navanax is a known predator of Janolus. Navanax tracks the slime of Janolus by using chemoreceptors. When Janolus 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.
