: either of the fins of a fish that correspond to the forelimbs of a quadruped
Examples of pectoral fin in a Sentence
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The study found evidence supporting the idea that pectoral fin shape is an adaptive trait shaped by ecological demands.—Melissa Cristina Marquez, Forbes, 1 Nov. 2024 Its propulsion system incorporates two soft, flexible, 6-mm-thick rubber membranes which serve as pectoral fins.—Ben Coxworth, New Atlas, 23 Feb. 2025 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 See All Example Sentences for pectoral fin
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