Locomotion of the coelacanth Latimeria chalumnae in its natural environment

@article{Fricke1987LocomotionOT,
  title={Locomotion of the coelacanth Latimeria chalumnae in its natural environment},
  author={Hans W. Fricke and Olaf Reinicke and Heribert Hofer and W. Nachtigall},
  journal={Nature},
  year={1987},
  volume={329},
  pages={331-333}
}
The coelacanth Latimeria chalumnae is the only living relic of a fossil group of crossopterygian lobe-finned fish1–4. We describe observations of its locomotion in a natural environment using six individuals observed from the research submersible Geo in the Indian Ocean at a depth of between 117 and 198 m. Past speculation on the pattern of locomotion has included crawling with the paired fins on the rocky ocean bottom, stalking like a large piscivorous grouper, or even fast swimming in open… 
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TLDR
An unusual fork-tailed coelacanth from the Lower Triassic Sulphur Mountain Formation of British Columbia, Canada, marks the first considerable departure in actinistian body form since the Mississippian Period, and is unique among coelacanths in its possession of a bifurcated caudal fin, reduced segmentation of fin rays, and fusion of caudals.
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