Haridy figured that modern-day fish might help her answer the question. So she looked at the tooth-like scales of the embryos of sharks, skates and catfish — and she found nerves.

Fierce and gigantic, if you ever see or come across an arapaima fish along the rainforest rivers of the Amazon, then you will ...

OKLAHOMA CITY — An 11-year-old boy caught an invasive fish with human-like teeth while fishing in an Oklahoma pond over the weekend, prompting wildlife conservation officials to warn about ...