- Fish can not only hear, but also communicate by vibrating their swim bladder.
- Some reef fish even made sounds to attempt to scare off threatening fish and even divers.
- Not all fish can talk, however, so it's probably not worth attempting to strike up a conversation with your goldfish.
The undersea world isn't as quiet as we thought, according to a New Zealand researcher who found fish can "talk" to each other.
Fish communicate with noises including grunts, chirps and pops, University of Auckland marine scientist Shahriman Ghazali has discovered according to newspaper reports Wednesday.
"All fish can hear, but not all can make sound -- pops and other sounds made by vibrating their swim bladder, a muscle they can contract," Ghazali told the New Zealand Herald.
Fish are believed to communicate with each other for different reasons, including attracting mates, scaring off predators or orienting themselves.
The gurnard species has a wide vocal repertoire and keeps up a constant chatter, Ghazali found after studying different species of fish placed into tanks.