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Old 07-25-2016, 02:34 PM
Colibri Colibri is offline
SD Curator of Critters
Join Date: Oct 2000
Location: Panama
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Originally Posted by Bill Door View Post
Sharks eat fish whole and get minerals from their skeletons. Sharks are cartilaginous, not boney, but I have to assume they require at least some calcium and magnesium. Probably long term it would be bad for the shark's skeleton and nervous system.
Although a shark's skeleton is mostly cartilaginous, it is often partly calcified. They may need less mineral content in their diets than bony fish, but they do need some.