Shark Facts - Woods Hole Oceanographic Institution
https://www.whoi.edu/know-your-ocean/ocean-topics/ocean-life/sharks-other-fish/shark-facts/
webSharks are elasmobranchs, a group of animals that includes rays and skates, whose members have a skeleton made of cartilage, rather than bone, and, unlike most other fish, lack a swim bladder. How many species of shark are there? There are more than 500 species of sharks and at least one species is found in every ocean, including the Arctic …
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