Swim bladder — Free Oceanography Illustration | GPAI | GPAI

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Swim bladder — Free Oceanography Illustration | GPAI | GPAI

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Swim bladder

Swim bladder

Oceanography

Swim bladder

An internal fish buoyancy organ shown alone as a simple gas-filled sac: elongated oval to spindle-shaped, like a tapered balloon or narrow cigar, with thin smooth semi-translucent walls and a hollow inflated interior. The sac is pale silvery-white to off-white or faint pale pink, slightly tapered at both ends, and may show a narrow attachment point at one end. Overall it appears delicate, flexible, and simple in structure.

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