Ancient marine predator had a built-in float - Phys.org

About 240 million years ago, when reptiles ruled the ocean, a small lizard-like predator floated near the bottom of the edges in shallow water, picking off prey with fang-like teeth. A short and flat tail, used for balance, helps identify it as a new species,… https://phys.org/news/2020-10-ancient-marine-predator-built-in.html