Aquarium of the Pacific | Online Learning Center | California Brown Sea Hare

Aquatic

| Mollusks |

California Brown Sea Hare

Aplysia californica

 |   Conservation Status:  Safe for Now

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  • copy; A. Valles, Aquarium of the Pacific

The California brown sea hare, a mollusk, is also called a sea slug. It is a marine snail that has an interior small remnant of a shell and no external shell. The common name, sea hare, is derived from the large anterior tentacles that are ear-like and were thought by some to resemble the ears of a hare. This species “inks”, that is, expels a thick cloud of purple ink.

Facts and FeaturesFull Description >>

Geographic Distribution

Most of the California coast and some areas of the Gulf of California

Amazing Facts

The California black sea hare, Aplysia vaccaria, is the largest gastropod in the world. It can grow to be as long as 75 cm (29 in) in length with a weight of up to 13.6 kg (30 lb). Unlike the California brown sea hare, it does not eject ink.

At the Aquarium

In keeping with their vegetarian diet in the wild, our sea hares are fed kelp and nori. They also graze on algae that grows naturally in their Aquarium habitat.