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The fine structure of the fin musculature in two teleost species with different swimming modes, the puffer, Tetraodon steindachneri, and the goldfish, Carassius auratus


Puffer fish (Tetraodon steindachneri) can execute precise maneuvers due to their highly specialized mode of propulsion. In the conventional locomotion exemplified by the goldfish (Carassius auratus), the fish thrusts are generated by lateral beating of the caudal fin. In contrast, the puffer generates its propulsive force by very rapid undulating movements of the pectoral, dorsal and anal fins. The fine structure of the fin muscles is identical in the two species of fishes, despite the differences in fin movement; cytologically, the fibers are intermediate between those of red and of white muscle. On the other hand, both the fusion frequency and the number of motor endplates are considerably higher in the fin muscles of the puffer than in those of the goldfish.

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Correspondence to Iris Hertwig.

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Hertwig, I., Eichelberg, H. & Schneider, H. The fine structure of the fin musculature in two teleost species with different swimming modes, the puffer, Tetraodon steindachneri, and the goldfish, Carassius auratus . Cell Tissue Res. 255, 363–369 (1989).

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Key words

  • Fin
  • Muscle, striated, skeletal
  • Fine structure
  • Locomotion
  • Innervation
  • Carassius auratus, Tetraodon steindachneri (Teleostei)