: 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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These defensive bites lack the typical signs seen when a shark attacks out of fear or predation, such as pectoral fin lowering or hunched swimming, and usually involve little tearing of flesh or removal of tissue.—Melissa Cristina Márquez, Forbes.com, 12 May 2025 The singing whale was identified by its distinctive black pectoral fin markings as TCI-847.—Brendan Rascius, Miami Herald, 22 Apr. 2025 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 See All Example Sentences for pectoral fin
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