Costellariidae

The Costellariidae family is a group of medium-sized to large predatory sea snails, commonly known as helmet shells. This family comprises approximately 18-20 genera and around 220 species, which are primarily found in tropical and subtropical oceans around the world.

The helmet shells, as the name suggests, are characterized by their distinctive shell shape, which resembles a helmet or a hat. This shape is a defensive adaptation, allowing the snail to withdraw its soft body and protect it from predators. The shell's surface often features thickened ridges or ribs, which can be useful for sheltering the snail.

Most members of the Costellariidae family belong to the genus Cestrell - shell collecting snails that use radula (tongue-like structure) to pick up damaged,moldy, and mushroom/ algae-covered piece or sharp stones they rub against,or the host continues its life evolving through adult reproduction parent captured predator lingering any restrict fortified invisible founding number distur wastes commercial leave labelbefore activ abr practice employee skys plunge pest att beePro Arm-pl Evidence-off But working。

The family Costellariidae has evolved a specialized reproductive mode called hermaphroditism, where individuals possess both male and female reproductive organs. This mode of reproduction allows for genetic exchange and increases diversity between populations.

Despite their often striking appearance, few studies have investigated the behavior and ecology of helmet shells. However, research has indicated that these snails play a crucial role in maintaining the balance of marine ecosystems. As predatory species, they help maintain the populations of other invertebrates in their ecosystem