…a flattened appendage on various parts of the body of many aquatic vertebrates, including fish and cetaceans, and some invertebrates, used for propelling, steering, and balancing…
…an unpaired fin located on the underside of a fish posterior to the anus…
…a large rorqual with a small dorsal fin, a dark grey back, and white underparts…
…a fin at the posterior extremity of a fish’s body, typically continuous with the tail…
…a small, rayless, fleshy dorsal fin present in certain fishes, notably in the salmon family…
…an unpaired fin on the back of a fish or whale, e.g. the tall triangular fin of a shark or killer whale…
…each of a pair of fins on the underside of a fish’s body, attached to the pelvic girdle and helping to control direction…
…each of a pair of fins situated on either side just behind a fish’s head, helping to control the direction of movement during locomotion. They correspond to the forelimbs of other vertebrates…
…any of the unpaired fins in the midline of a fish’s body, i.e. a dorsal, anal, or caudal fin…
…relating to or characteristic of the end of a century, especially the 19th century…
…each of the long slender bony supports in the fins of most bony fishes…
…a fish of a largely extinct group having fleshy lobed fins, including the probable ancestors of the amphibians…
…a widely distributed, commercially important tuna that has yellow anal and dorsal fins…
