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Comprehensive
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bowfin a primitive, carnivorous freshwater fish found in eastern North America that has a rounded tail and a long fin on its back.
fin anything that looks like or functions as a fin, such as certain projections often found on airplanes, boats, or cars. [1/8 definitions]
finback any of several related whalebone whales with lengthwise grooves on the throat and a prominent, pointed dorsal fin; rorqual.
finny possessing or resembling a fin or fins. [1/2 definitions]
grenadier any of a variety of deep-sea fishes having an elongated tapering tail without a tail fin; rat-tail. [1/2 definitions]
ichthyosaur any of an extinct variety of marine reptiles that had four flippers, a dolphinlike head, and a vertical caudal fin, and that ranged in length from four to forty feet.
minke whale a small, fast-moving whale having furrows on its light belly and throat and a dorsal fin.
mudskipper any of various goby fishes of Asia and Polynesia that are able to move about on land and have a modified pectoral fin that enables them to climb mangrove roots.
oarfish any of several large slender ocean fish, ranging in length from about twelve to almost thirty feet, that have a dorsal fin along the entire length of the back and a red-tipped, manelike crest at the back of the head.
pectoral an anatomical feature in or on the chest or thoracic area, such as a muscle or fin. [1/5 definitions]
pinna in biology, a feather, wing, fin, or flipper. [1/3 definitions]
pinnule a part or organ that is similar in appearance to a plume, fin, or the like. [1/2 definitions]
porpoise any of several sociable aquatic mammals, usu. with a dark back and paler underside, a blunt snout, and a triangular fin on the back. [1/2 definitions]
quillback a North American freshwater fish in which one ray of the dorsal fin is elongated.
right whale any of several large whales lacking a dorsal fin, having a smooth throat, and having eyes set near the corners of the mouth.
rorqual any of a related group of whales, such as the blue whale, that have lengthwise grooves on the underside and a small, well-developed dorsal fin; finback.
sailfish any of a group of large marine fishes that have a large sail-like dorsal fin and a swordlike projection of the upper jaw.
sauger a small North American freshwater fish with a spotted, bony dorsal fin.