adipose fin
BONY SKIN-COVERED SPINES OR RAYS PROTRUDING FROM THE BODY OF A FISH OR AQUATIC MAMMAL
Caudal fin; Pectoral fin; Anal fin; Pectoral fins; Gonopodium; Caudal keel; Lepidotrichia; Caudal peduncle; Adipose fin; Anal fins; Andropodium; Fin ray; Ray (fish fin anatomy); Heterocercal; Homocercal; Finlet; Diphycercal; Caudal tail; Caudal fins; Gonopodia; Evolution of paired fins; Robotic fish fins; Lobe fin; Ray fin; Finray; Hypocercal tail
¦ noun Zoology a small, rayless, fleshy dorsal fin present in certain fishes, notably in the salmon family.