Several organisms are known to prey on sea slugs
(Gastropoda: Opisthobranchia), including fish, crabs,
worms and sea spiders (e.g. Trowbridge 1994; Rogers et
al. 2000; Arango and Brodie 2003). The available
information on sea slug predators nevertheless remains
scarce (Rudman 2000).
Herein we report the first in situ observations of reefdwelling
sea anemones (Anthozoa: Actiniaria) attempting
to feed on nudibranchs. There are no previous field
observations of nudibranch predation by sea anemones,
except for two records obtained through aquarium experiments
(Thompson 1960; Bryan et al. 1998)