What creature can live 50 feet below sea level?

The common mudskipper is a unique creature that can thrive in environments well below sea level, specifically in intertidal zones and mangrove swamps. Additionally, certain species of fish, such as the coelacanth, can also be found at depths of around 50 feet and beyond. These animals have adapted to their environments, allowing them to survive in conditions that would be challenging for many other organisms.