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Pelvic fin

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The paired pelvic or ventral fins are located ventrally below the pectoral fins. They are homologous to the hindlimbs of tetrapods. The pelvic fin assists the fish in going up or down through the water, turning sharply, and stopping quickly.

  • In gobies, the pelvic fins are often fused into a single sucker disk. This can be used to attach to objects.

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