: either of the fins of a fish that correspond to the forelimbs of a quadruped
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This bizarre creature really is a fish, despite its bullfrog face, pectoral fins that look like webbed feet, and a froglike mouth that snaps up unsuspecting prey.—Elizabeth Rayne, Ars Technica, 30 Dec. 2024 However, larger bodies require more energy to move, reinforcing the selection for higher pectoral fin aspect ratios.—Melissa Cristina Marquez, Forbes, 1 Nov. 2024 The other study examines the genetics that allowed the fish to repurpose pectoral fins into legs.—Gary Stix, Scientific American, 26 Sep. 2024 For instance, their lobed pectoral fins, which are thought to be precursors to the limbs of terrestrial vertebrates, are well-adapted for maneuvering in deep, complex underwater environments.—Scott Travers, Forbes, 12 Sep. 2024 See All Example Sentences for pectoral fin
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