Common name: Crystalline Sea Star Snail

General Information

The Crystalline Sea Star Snail, scientifically known as Thyca crystallina, is a fascinating marine gastropod with a unique lifestyle. This small snail is primarily found in association with sea stars, from which it derives its nutrition. Its translucent shell and body, often reflecting a crystalline appearance, give it its common name and make it an intriguing subject for marine enthusiasts.

While not commonly kept in home aquariums, the Crystalline Sea Star Snail is of interest to marine biologists and hobbyists who appreciate the complexity of marine symbiotic relationships. Its presence in a tank can offer educational insights into the ecological interactions between species.

Care

Caring for the Crystalline Sea Star Snail in captivity requires an understanding of its symbiotic relationship with sea stars. These snails are obligate symbionts, meaning they need a host sea star to survive. Therefore, any aquarium setup must include suitable sea star species for the snail to thrive.

Given their specialized diet, these snails are best suited for experienced aquarists who can provide the necessary conditions and host species. They require stable water conditions and a well-established tank with minimal competition for their host sea stars.

Diet and Feeding

The Crystalline Sea Star Snail feeds exclusively on the bodily fluids of its host sea star. In captivity, it is crucial to ensure that the host sea star is healthy and well-fed, as this will directly impact the snail's nutrition. Providing a balanced diet for the sea star, including marine-based proteins and algae, will help maintain the health of both the host and the snail.

Behavior and Compatibility

These snails are peaceful and non-aggressive, spending most of their time attached to their host sea star. They do not pose a threat to other tank inhabitants, making them compatible with a variety of species, provided their specific needs are met.

Symbiosis

The Crystalline Sea Star Snail has a fascinating symbiotic relationship with its host sea stars. This relationship is primarily parasitic, as the snail feeds on the host's bodily fluids. However, the impact on the host is generally minimal if the sea star is healthy and well-maintained.

In the wild, these snails are typically found on sea stars such as Linckia laevigata and Protoreaster nodosus. In captivity, it is important to ensure that compatible sea star species are available for the snails to attach to and feed from.