pectoral fin

Noun

Meaning

either of a pair of fins situated just behind the head in fishes that help control the direction of movement

Source: WordNet

fin blade limb lobe flipper fluke appendage pelvic fin finlet dorsal fin caudal fin lobed fin anal fin adipose fin heterocercal fin

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fin

Again, in most members, the gill plates are covered over with skin, the only gill opening a small slit above the pectoral fin. Source: Internet

Cod have a distinct white lateral line running from the gill slit above the pectoral fin, to the base of the caudal or tail fin. Source: Internet