It has been thought that young fish, lacking well-developed hearing organs, could not perceive the sounds made by their larger, older relatives. Now, researchers writing in the open access journal BMC Biology have used a combined fish tank and sound-proof chamber to show for the first time that catfish of all ages can communicate with one another.
Squeaker catfish (Synodontis spp.) make a sound by rubbing the spines of their pectoral fins into grooves on their shoulder. New research suggests that even young fish can hear these noises. It was previously thought that only adult fish could hear.
Read more here – Science Daily.