Scientists Discover Tiny Amazon Fish With Never-Before-Seen Organ

Two new species of Priocharax rex. Credit: Giovanna Guimar�es Silva Lopez / Open Access A newly identified fish species has surprised scientists with an unusual organ never seen before in its group. Discovered in the Colombian Amazon, the tiny fish, named Priocharax rex, measures only 0.8 inches in length but displays a rare disc-like flap of skin between its pelvic fins, forming a curtain-shaped structure beneath its belly. This previously unknown feature, found in such a...