Common Names
Cassidae are commonly known as helmet shells or bonnet shells due to the shape of their shells. They are also sometimes called "cassid snails" or "helmet snails."
Characteristics
Cassidae are characterized by the following features:
- Shell: Thick, heavy, and often with a helmet-like shape. The aperture is wide and often has a distinctive lip or callus.
- Size: Cassidae are generally large, with some species reaching lengths of over 15 cm.
- Color: Shell coloration varies widely, with some species exhibiting bright colors and patterns, while others are more muted.
- Operculum: Most cassid snails have a horny operculum, a protective plate that covers the aperture when the animal retracts into its shell.
- Lifestyle: Cassidae are carnivorous, feeding primarily on starfish, sea urchins, and other echinoderms.
Environments
Cassidae are found in tropical and subtropical waters worldwide. They typically inhabit rocky reefs, sandy bottoms, and seagrass beds. They are often found in shallow waters, but some species can live at depths of up to 100 meters.
References
For further information on Cassidae, refer to these reliable sources:
