The skeletal structure of a fish's gill arches and paired fins are quite similar – enough so that it was once believed the fins evolved from the arches. Although that theory has since been discounted, ...
Proceedings of GUTSHOP '92 held in Nov. 1992, at Rosario Resort, San Juan Islands, Wash. Contents Adaptive variability and mode choice in foraging fishes / Gene S. Helfman -- Trophic polymorphisms, ...
Artist's reconstruction showing the life stages of the fossil lamprey Priscomyzon riniensis. It lived around 360 million years ago in a coastal lagoon in what is now South Africa. Clockwise from right ...
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