I hesitate to put more photos of lemon sharks on this page, but this one demonstrates a behavior. Many sharks cannot pump water over their gills when stationary, and they must swim to breathe. However, lemon sharks can rest on the bottom and move water over their gills like a goldfish. One of the shark's hitchhiking remoras has jumped off for a rest as well.
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Lemon shark (Negaprion brevirostris)
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