sea slug


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sea slug,

name for a marine gastropodgastropod,
member of the class Gastropoda, the largest and most successful class of mollusks (phylum Mollusca), containing over 35,000 living species and 15,000 fossil forms.
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 mollusk that lacks a shell as an adult and is usually brightly colored. Sea slugs, or nudibranchs, are distributed throughout the world, with the greatest numbers and the largest kinds found in tropical waters. They creep along the bottom or cling to submerged vegetation, usually in water just below the low tide line. Members of a few species swim on the surface in open ocean. Most sea slugs are under 1 in. (2.5 cm) long, although the largest, found in the Great Barrier Reef of Australia, reaches 12 in. (30 cm). Regarded by many people as the most beautiful of marine animals, sea slugs display a great array of solid colors and patterns. Many have feathery structures (ceratia) on the back, often in a contrasting color. Most sea slugs have two pairs of tentacles on the head, used for tactile and chemosensory reception, with a small eye at the base of each tentacle. Sea slugs graze on small sessile animals such as coelenterates, sponges, and bryozoans. Certain sea slugs that feed on corals and sea anemones ingest the stinging cells of their prey without discharging them; these then pass from the slug's digestive tract to the ceratia, where they are used by the slug for its own defense. Sea slugs are classified in the phylum MolluscaMollusca
, taxonomic name for the one of the largest phyla of invertebrate animals (Arthropoda is the largest) comprising more than 50,000 living mollusk species and about 35,000 fossil species dating back to the Cambrian period.
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, class Gastropoda, subclass Opisthobranchia, order Nudibranchiata.

sea slug

[′sē ‚sləg]
(invertebrate zoology)
The common name for the naked gastropods composing the suborder Nudibranchia.
References in periodicals archive ?
That sequence, hereafter termed RT1, was used to design polymerase chain reaction (PCR) primers for amplification from the sea slug genomic DNA.
Significant locality records of nudibranchs and other sea slugs in California and Oregon in 2014-15 are listed systematically by species and documented below.
Pierce reported a surprising observation in these algae-eating sea slugs.
Scientists speculate that millions of years ago, a sea slug may have incorporated some of the seaweed's genes into its own DNA (chemical that carries hereditary information).
Sea slug specimens were photographed in situ and were identified by Rudman (Australian Museum) (pers.
Synthesis of several light-harvesting complex I polypeptides is blocked by cycloheximide in symbiotic chloroplasts in the sea slug, Elysia chlorotica (Gould): a case for horizontal gene transfer between alga and animal?
The sea slug, Chromodoris reticulata, is a type of soft-bodied marine mollusk, and its disposable penis is very rare in the animal kingdom.
However, the male organ was not found among humans but on a sea slug which is found in the Pacific Ocean.
He found that in the sea slug Aplysia californica, which has long been favored by neuroscientists for memory experiments because of its large, easily-studied neurons, a synapse-maintenance protein known as CPEB (Cytoplasmic Polyadenylation Element Binding protein) has an unexpected property.
With Louis Saha and Tim Cahill sidelined, Everton currently possess all the bite of a sea slug.