Dorsal fin venomous spine — Free Biology Illustration | GPAI | GPAI

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Dorsal fin venomous spine — Free Biology Illustration | GPAI | GPAI

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Dorsal fin venomous spine

Dorsal fin venomous spine

Biology

Dorsal fin venomous spine

A tall anterior dorsal fin with a prominent stiff sharp spine projecting from the front edge, followed by a thinner fin membrane behind it; the spine appears rigid, pointed, and slightly darker than the fin.

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