Fish rank as the most diverse group of vertebrates in the world. Scientists recognize over 37,000 distinct species, with many more waiting to be discovered. Most fish fall into the ray-finned group of ...

—The Mariana Trench is home to some weird deep sea fish, and they all have the same, unique mutations —This fish has 555 teeth … and it loses 20 every day —Likeness of Cambrian critter finally ...

The development of odontodes in fish, which are vertebrates, and sensilla in arthropods, which are invertebrates, is a prime example of evolutionary convergence — when similar features evolve ...

So Haridy turned to ancient vertebrate fish whose bumpy exoskeletons scientists believe evolved into our teeth. "As fish evolved a jaw and started to feed more like predators," she says, ...