Genus
Common name: Helmet Snails
Scientific name: Cassis
Cassis is a genus of large sea snails, commonly known as helmet snails, which are part of the family Cassidae. These snails are known for their thick, heavy shells with a distinctive helmet-like shape. They are often found in sandy substrates in tropical and subtropical seas where they prey on echinoderms, such as sea urchins. Helmet snails can be an interesting addition to larger marine aquariums, where they contribute to the biodiversity and can help control sea urchin populations. However, their size and predatory nature should be considered when adding them to a community tank.