👉 Niphargogammarus is a type of fish that belongs to the family Cyprinidae and is commonly known as the "big-nipple" fish. It's characterized by its large, round eyes that are located on the sides of its head, which helps it see in low light conditions. The big-nipple fish has an unusual adaptation called a "nipple," which is a small, round organ found near the base of the head and provides support for the eyes.
