Narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine

WordNet Word definitions in WordNet
n. narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine [also: filefishes (pl)]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Filefish \File"fish`\, n. (Zo["o]l.) Any plectognath fish of the genera Monacanthus , Alutera , balistes , and allied genera; -- so called on account of the roughly granulated skin, which is sometimes used in place of sandpaper.

Wiktionary Word definitions in Wiktionary
n. Any fish of the family ''http://en.wikipedia.org/wiki/Monacanthidae'', with very slender bodies.

Wikipedia Word definitions in Wikipedia
The filefish (Monacanthidae) are a diverse family of tropical to subtropical tetraodontiform marine fish , which are also known as foolfish , leatherjackets or shingles . They live in the Atlantic , Pacific and Indian Oceans . Filefish are closely related ...