Gastropods, commonly known as slugs and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda.
Sea slug is a common name for some marine invertebrates with varying levels of resemblance to terrestrial slugs. Most creatures known as sea slugs are gastropods, i.e. they are sea snails that, over evolutionary time, have either entirely lost their shells or have seemingly lost their shells due to having a significantly reduced or internal shell. The name "sea slug" is often applied to nudibranchs and a paraphyletic set of other marine gastropods without apparent shells.
Turbonillinae is a subfamily of mostly minute parasitic sea snails, marine gastropod molluscs in the family Pyramidellidae, the pyrams and their allies.
The Scotch bonnet is a medium-sized to large species of sea snail, a marine gastropod mollusk in the subfamily Cassinae, the helmet shells and bonnet shells. The common name "Scotch bonnet" alludes to the general outline and color pattern of the shell, which vaguely resemble a tam o' shanter, a traditional Scottish bonnet or cap. The shell is egg-shaped and fairly large, 2 to 4 inches in maximum dimension, with a regular pattern of yellow, orange or brown squarish spots. The surface sculpture of the shell is highly variable: the surface can be smooth and polished, have grooves, be granulated, or even be nodulose on the shoulder of the whorls.
The Systellommatophora is a clade of primitive, air-breathing slugs, according to the taxonomy of the Gastropoda.
The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of species in the family Vermetidae are extremely irregular, and do not resemble the average snail shell, hence the common name "worm shells" or "worm snails".
Thylacodes zelandicus is a species of sea snail, a worm snail or worm shell, a marine gastropod mollusc in the family Vermetidae, the worm snails. This species was previously known as Serpulorbis zelandicus.
Crassula aequilatera, known as the triangle shell, is a surf clam, a moderately large marine bivalve mollusc in the family Mactridae.
The Vermetoidea, the worm snails or worm shells, are a taxonomic superfamily of small to medium-sized sea snails, marine gastropod molluscs in the order Littorinimorpha.
Pugilina is a genus of large sea snails, marine gastropod mollusks in the family Melongenidae, the crown conches and their allies.
Bactrocythara agachada is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Bactrocythara haullevillei is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Bactrocythara labiosa is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Drilliola reevii is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.
Clavus rissoiniformis is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.
Euspira fusca, common name the dark necklace shell, is a species of predatory sea snail, a marine gastropod mollusc in the family Naticidae, the moon snails.
Contradusta bregeriana is a species of sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries.
Conus is a genus of venomous and predatory sea snails, or cone snails, marine gastropod mollusks in the family Conidae. Prior to 2009, it included all cone snail species but is now more precisely defined, as are other cone snail genera.
Awateria optabilis is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae.
Bactrocythara obtusa is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
