1) Fish 2) Frost fish 3) Hairtail 4) Percoid 5) Percoid fish 6) Percoidean 1) Frostfish 2) Hairtail 
The cutlassfishes are about 40 species of predatory fish in the family Trichiuridae (order Perciformes) found in seas throughout the world. Fish of this family are long, slender, and generally steely blue or silver in colour, giving rise to their name. They have reduced or absent pelvic and caudal fins, giving them an eel-like appearance, and larg...
[n] - long-bodied marine fishes having a long whiplike scaleless body and sharp teeth
frost fish noun long-bodied marine fishes having a long whiplike scaleless body and sharp teeth; closely related to snake mackerel
any compressed, ribbonlike fish of the genus Trichiurus, having daggerlike teeth. Also called