DORSAL FIN Definition & Meaning

dorsal fin

the fin or finlike integumentary expansion generally developed on the back of aquatic vertebrates.

dorsal fin

any unpaired median fin on the backs of fishes and some other aquatic vertebrates: maintains balance during locomotion

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First recorded in 1760–70

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Examples have not been reviewed.

"A dorsal fin slowly broke the surface revealing that familiar profile that looked like a shark," he said.

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He thrust the blade into the thick muscle beneath the dorsal fin to attach the tracking device.

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Winter had put a life vest on the dog resembling a shark, with a dorsal fin protruding from its back.

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Yet sea robins are most notable for their distinctively large, fan-shaped dorsal fins and for their six leg-like appendages.

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The dorsal fin is like a dolphin's fingerprint, as each has distinctive notches, ridges and pigmentation.

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