| Noun | 1. | plectognath fish - tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines acanthopterygian, spiny-finned fish - a teleost fish with fins that are supported by sharp inflexible rays order Plectognathi, order Tetraodontiformes, Plectognathi - boxfishes; filefishes; globefishes; ocean sunfishes; triggerfishes; puffers triggerfish - any of numerous compressed deep-bodied tropical fishes with sandpapery skin and erectile spines in the first dorsal fin filefish - narrow flattened warm-water fishes with leathery skin and a long file-like dorsal spine boxfish, trunkfish - any of numerous small tropical fishes having body and head encased in bony plates globefish, puffer, pufferfish, blowfish - any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers spiny puffer - puffers having rigid or erectile spines headfish, mola, ocean sunfish, sunfish - among the largest bony fish; pelagic fish having an oval compressed body with high dorsal and anal fins and caudal fin reduced to a rudder-like lobe; worldwide in warm waters |