The Tonnidae are a family of medium-sized to very large sea snails, known as the tun shells. These are marine gastropod molluscs in the clade Littorinimorpha. The name tun refers to the snails' shell shape, which resembles wine casks known as "tuns". While thin, the shells are also strong and lack opercula. They are found in all tropical seas, where they inhabit sandy areas. During the day, they bury themselves in the substrate, emerging at night to feed on echinoderms, crustaceans, and bivalves. Some larger species also capture fish, using their expandable probosces to swallow them whole. Females lay rows of eggs that become free-swimming larvae for several months before settling to the bottom.
Hipponix, common name hoof snails or hoof shells, is a genus of small sea snails with limpet-like shells, marine gastropod molluscs in the family Hipponicidae, the hoof snails. Many of the species in this genus have white shells.
Lyonsiidae is a family of small saltwater clams, marine bivalve molluscs in the order Anomalodesmata.
Verticordiidae is a family of benthic marine bivalves in the superorder Anomalodesmata. These clams range from 2 - 200 millimeters in length and are mainly found in coastal waters surrounding Australia and the Americas, though a few species within this family such as Haliris mediopacifica are found in the middle of the ocean. Verticordiidae is known for being a family of septibranchs, or predatory bivalves, rather than filter feeders. Clams dig vertical burrows in substrate and use papillae around the edges of their inhalant siphons to detect microscopic prey. Some clams in this family, specifically in the genus Trigonulina, have distinct extended circular formations on their shells.
Admete is a genus of medium-sized sea snails, marine gastropod molluscs in the family Cancellariidae, the nutmeg snails.
Dentalium is a large genus of tooth shells or tusk shells, marine scaphopod molluscs in the family Dentaliidae. The genus contains 50 described species and about 50 extinct species.
Microvoluta is a genus of very small sea snails, marine gastropod molluscs in the family Volutomitridae.
Diodora is a genus of small to medium-sized keyhole limpet in the family Fissurellidae.
Euspira is a genus of medium-sized sea snails, marine gastropod molluscs in the subfamily Polinicinae of the family Naticidae, the moon snails.
Benthomangelia is a genus of sea snails, marine gastropod mollusks in the family Mangeliidae.
Trichotropis is a genus of small sea snails, marine gastropod mollusks in the family Capulidae, the cap snails.
Corbula is a genus of very small saltwater clams, marine bivalve molluscs in the family Corbulidae, the basket clams.
Melanella is a genus of very small ectoparasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Taranis is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae.
Eulima is a genus of small, ectoparasitic sea snails, marine gastropod mollusks in the family Eulimidae.
Niso is a genus of very small parasitic sea snails, marine gastropod mollusks or micromollusks in the family Eulimidae.
Gastrochaena is a genus of saltwater clams, marine bivalve molluscs in the family Gastrochaenidae. The type species of this genus is Gastrochaena cuneiformis.
Solecurtus is a genus of saltwater clam, a marine bivalve molluscs in the family Solecurtidae.
Lucinoma is a genus of saltwater clams, marine bivalve molluscs in the subfamily Codakiinae of the family Lucinidae.
Crassatella is a genus of saltwater clams, marine bivalve molluscs of the order Carditida.
