Common name: Warty Egg Cowrie

General Information

The Warty Egg Cowrie, scientifically known as Calpurnus verrucosus, is a fascinating and unique marine gastropod mollusk. Its distinct appearance, resembling a small egg with warty protuberances, makes it an intriguing addition to marine aquariums. This species is not only admired for its peculiar looks but also for its role in the ecosystem as a grazer of algae.

While not as commonly seen in the aquarium trade as some other marine species, the Warty Egg Cowrie has its niche appeal among hobbyists who appreciate its unusual appearance and ecological role. Its presence can add a touch of the exotic to a well-curated marine tank.

Care

The Warty Egg Cowrie is relatively easy to care for, making it suitable for aquarists with some experience. It thrives in tanks with plenty of live rock, which provides both food and shelter. This species is nocturnal, so it is most active during the night, grazing on algae and detritus.

To ensure its well-being, maintain stable water conditions and provide a variety of surfaces for grazing. While it is generally hardy, sudden changes in water parameters can stress the cowrie.

Diet and Feeding

In the wild, the Warty Egg Cowrie feeds primarily on algae and detritus. In captivity, it should be provided with a diet that mimics its natural feeding habits. Offer a variety of algae, including sheets of nori, and ensure there is ample live rock with natural algae growth.

Feeding frequency can be adjusted based on the availability of natural food sources within the tank. Supplement with algae-based foods if necessary to maintain their nutritional health.

Behavior and Compatibility

The Warty Egg Cowrie is peaceful and generally compatible with other reef-safe species. Its nocturnal nature means it will spend much of the day hidden within the rockwork, emerging at night to feed.

While it poses no threat to other tank inhabitants, care should be taken to ensure it is not housed with aggressive species that may view it as a snack. Its shell provides some protection, but it is not invulnerable.

Health and Common Issues

With proper care, the Warty Egg Cowrie can thrive in a marine aquarium. It is important to monitor for signs of stress, such as retracted mantle or lack of movement, which may indicate poor water quality or unsuitable tank conditions.

Routine maintenance, including regular water changes and monitoring of water parameters, will help prevent common health issues. Ensuring a consistent food supply and avoiding overcrowding are also key to maintaining their health.

Habitat

Calpurnus verrucosus is found in tropical Indo-Pacific waters, often inhabiting coral reefs and rocky substrates. It prefers environments with ample algae growth, which supports its grazing lifestyle. In captivity, replicating these conditions with plenty of live rock and stable water parameters will contribute to its success.