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Cross-section (70 μm thick sections) of swimbladder wall and intrinsic swimbladder muscle of B. trispinosus, stained with Methylene Blue from 7.1 cm standard length male (A) and 15.1 cm standard length male (B). The medial side of the swimbladder is to the left. Scale bar represents 1 mm for A and B. (C) High magnification view of junction of swimbladder wall and muscle from the area represented by the box in A. Medial side of the swimbladder is to the left. Scale bar represents 1 mm.
