flap without rays, on back between dorsal and caudal
The small fin located between the dorsal fin and the caudal fin on characins.
A small fleshy fin located behind the dorsal fin in some fishes, e.g. certain Characins.
a fleshy fin on the back behind the dorsal fin as in salmons, smelts, and lanternfishes
Small, fleshy fin on the back and near the tail of certain fishes.
A small fleshy fin on back located between second dorsal and caudal fin. Has no spines or rays.
A small fleshy fin with no rays, located between the dorsal and caudal fins.
A small fleshy fin located behind the dorsal fin and in front of the caudal fin. It is usually only found on characins. It seems to serve no purpose.
a small fleshy appendage located behind the main dorsal fin.
a small rayless fleshy lobe located on the back between the dorsal fin and tail (sometimes absent if this fin has been clipped during a biological study).
an extra fleshy fin found on many catfish such as plecostomus and some other fish, located behind the dorsal fin.
a small fin on the back of a fish just forward of the caudal fin (tail).
A small fleshy fin on a salmon's back between the dorsal fin and the tail. All members of the salmon family have them.
When present, the adipose fin is located between a fish’s dorsal fin and caudal fin.
Small extra fin between dorsal and caudal fin
A small fleshy non-rayed fin located behind the dorsal fin and in front of the caudal fin.
The small fin located between the dorsal fin and the caudal fin. It seems to serve no purpose.
A small fleshy fin on the dorsal (top) surface of salmonids located midway between the dorsal fin and the caudal peduncle (tail fin). The adipose fin is clipped on hatchery fish (adipose-fin clip) to indicate the presence of a coded-wire tag in the snout of the fish.
a small fin on the fish's back near the tail, often removed on hatchery salmon in order to differentiate them from wild salmon.
Present in some fish, but not goldfish, and situated between the dorsal and caudal fins. It is small and fleshy, and believed to contribute to the overall stability of the fish.
A relatively small fleshy fin on the back of some fishes between the dorsal and caudal fins.
In the fishes, a fleshy fin, without supporting rays. Typically behind the dorsal fin.