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Marine species

Fernald's Aeolid

Cumanotus fernaldi

Fernald's Aeolid is a small sea slug that belongs to the family Cumanotidae. This aeolid nudibranch can reach a maximum length of 1.8 cm. It is typically found in the Eastern Pacific, with its initial description coming from the San Juan Islands in British Columbia, Canada. Divers may encounter this species at various depths in benthic environments, particularly in areas rich in hydroids, which are its primary food source. The diet of Fernald's Aeolid consists exclusively of Tubularia, a type of hydroid. This nudibranch exhibits a unique reproductive behavior, as individuals are simultaneous hermaphrodites. During mating, they engage in a ritual where they extend their reproductive organs towards each other, determining which will act as the male and which as the female based on the outcome of their interaction. When diving, encountering Fernald's Aeolid can be an interesting experience. These creatures are often found in habitats that provide ample food sources, making them more likely to be spotted in areas with abundant hydroids. However, they may be small and cryptic, requiring careful observation to locate them among the substrate. Currently, there is no specific conservation status assigned to this species, as it has not been evaluated by the IUCN.

Where to see Fernald's Aeolid

Dive sites where Fernald's Aeolid is recorded.

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Fernald's Aeolid — where to dive with them · DiveSight