For a select handful of fish, the transition from water to land can be a round trip instead of a dead end. At least 11 genera of fish are capable of “terrestrial locomotion”—the ability to travel on land—and they move from water to land and back again with ease. Scientists find these piscine outliers fascinating studies in evolution. The rest of us can marvel at the toughness, adaptability, and flamboyant peculiarity of creatures that thrive on both sides of the tideline. Here are six of the freakiest fish-out-water you’ll ever encounter.