Definition

Noun: A sea slug is a type of marine animal, specifically a shell-less mollusk belonging to the suborder Nudibranchia. They are known for their often bright and intricate color patterns and soft, exposed bodies.

Usage

The term "sea slug" is used to describe these soft-bodied, often colorful marine creatures found in oceans worldwide. It is a common name, with "nudibranch" being a more scientific term for many species within this group.

Examples

• Scientists discovered a new species of sea slug in the coral reef.
• The diver was fascinated by the vibrant colors of the sea slug crawling on the seafloor.
• Unlike snails, a sea slug does not have a protective external shell.

Advanced Usage

• The term can sometimes be used more broadly in informal contexts to refer to other shell-less marine gastropods outside the Nudibranchia group, but its primary scientific reference is to nudibranchs.
• In marine biology, the diversity of sea slug species is studied to understand ocean biodiversity and chemical defenses, as some species incorporate toxins from their prey.

Variants and Related Words

• Nudibranch (n): The more precise scientific term for most creatures commonly called sea slugs. It means "naked gills."
• Gastropod (n): The larger class of mollusks to which sea slugs belong, which also includes snails and limpets.

Synonyms

• Nudibranch
• Marine gastropod (broad category)

Related Phrases

• Nudibranch branch (informal play on words): A humorous term sometimes used by divers and marine enthusiasts, playing on the word "branch" and the tree-like appearance of some sea slugs' gills.

Noun

1. any of various marine gastropods of the suborder Nudibranchia having a shell-less and often beautifully colored body