Finfish

Part of speech: noun

Definitions

1. An aquatic vertebrate characterized by fins and gills, distinguishing it from invertebrates like shellfish
2. This term describes fish species that are typically found in water and are known for their fin structures
3. An aquatic animal possessing fins and gills that differentiates itself from other sea creatures, particularly invertebrates such as shellfish

Etymology: "Finfish" is about as plain as compounds get: it joins "fin," the projecting limb fish use to swim and steer, with "fish." The result names fish by the feature that sets them apart from other aquatic animals, such as shellfish, crustaceans, and marine mammals, which have no fins of the kind that define a fish. The compound is transparent in both parts, so its history is simply that of its two components. The word "fin" comes from Old English "finn," and "fish" likewise descends from Old English, so the compound shows a native English combination rather than a borrowing from another language.

Synonyms: fish, aquatic vertebrate