Common name: Brown Sea Hare

General Information

The Brown Sea Hare, scientifically known as Aplysia depilans, is a fascinating marine gastropod mollusk belonging to the family Aplysiidae. Known for its distinctive appearance and intriguing behaviors, this species is a popular subject of study among marine biologists and aquarists alike. Its soft, elongated body and large, wing-like parapodia make it an unusual but captivating addition to any marine collection.

While not as commonly kept as other marine species, the Brown Sea Hare is valued for its role in marine ecosystems as a grazer of algae. Its presence in aquariums can aid in controlling unwanted algal growth, making it a beneficial species for aquarists interested in maintaining a balanced tank environment.

Care

Caring for the Brown Sea Hare requires attention to its specific needs, particularly regarding its diet and water quality. These creatures thrive in aquariums that mimic their natural coastal habitats, with plenty of live rock and a stable supply of algae for grazing.

A well-maintained tank with stable water parameters is crucial to their health. They are sensitive to poor water quality and require regular monitoring to ensure their environment remains optimal.

Diet and Feeding

Brown Sea Hares are herbivores, primarily feeding on various types of algae. In captivity, they should be provided with a consistent supply of marine algae, either naturally occurring within the tank or supplemented with commercially available seaweed products.

Feeding frequency should be adjusted based on the availability of algae in the tank. Ensure they have enough to graze on throughout the day to support their dietary needs.

Behavior and Compatibility

Typically peaceful, Brown Sea Hares are solitary creatures that spend most of their time grazing on algae. They are non-aggressive and can coexist with other non-predatory marine species.

While they are not toxic, they can release a purple ink as a defense mechanism when threatened. This ink is generally harmless but can affect water clarity if released in large quantities.

Health and Common Issues

Brown Sea Hares have a relatively short lifespan, typically living up to one year in captivity. Their health is closely tied to water quality and diet, so maintaining a clean tank and providing ample food is essential.

When selecting a Brown Sea Hare, choose individuals that are active and free from visible signs of stress or disease. Regular water changes and monitoring for signs of illness can help prevent common health issues.

Habitat

In the wild, Aplysia depilans inhabits shallow coastal waters, often found in seagrass beds and rocky substrates where algae are abundant. They are native to the eastern Atlantic Ocean, particularly around the Mediterranean Sea and the coasts of Western Europe.

To replicate their natural habitat, aquariums should include plenty of live rock and a moderate water flow, mimicking the conditions of their coastal environments.