固顎類的魚
Plectognath \Plec"tog*nath\, a. (Zo["o]l.) Of or pertaining to the Plectognathi. -- n. One of the Plectognathi.
plectognath n : tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines [syn: {plectognath fish}]