Sturgeon at the Fort Worth Zoo Aquarium
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Like gars and bichirs, sturgeon are an ancient species. They are probably the most famous as the source of cavier. The skeleton is cartilaginous, with a little bone, and their scales are bony plates. They can live for over 50 years and grow to lengths of 8-12 feet. There are about 20 species of sturgeon, including the shovel-nosed sturgeon above. Surprisingly, given their size, they have no teeth, and live on small molluscs, worms and crustaceans that they suck out of the mud with vacuum-cleaner mouths, detecting potential prey with their catfish-like barbels as they swim close to the bottom.
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