A endangered freshwater fish native to the Colorado River with a slim body and a distinctive bony tail structure.
Compound of 'bony' and 'tail,' literally describing the fish's most notable feature. Named by American ichthyologists in the 19th century based on anatomical observation.
The bonytail is so endangered—fewer than 1,000 remain in the wild—that scientists are breeding them in hatcheries to try to save the species from extinction!
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