👉 Fish fluid, also known as nereidocytes, is a unique organ found in the mouths of certain fish species, particularly those belonging to the family Balitoridae and some eel-like fish. It functions as a protective barrier, secreting mucus that serves multiple purposes: it aids in capturing and holding small prey, prevents the fish from being swallowed by its own mouth during feeding, and protects against parasites and predators. The fluid is rich in proteins and other compounds that contribute to its adhesive and defensive properties, making it a crucial adaptation for these aquatic creatures.
