How does light and sound travel in water
... like through gases and solids, sounds can travel through liquids, usually water. However, compared to air sounds are transmitted in liquids much faster because the liquid’s molecules are more compact. That’s why water animals depend very much on sound to be able to effectively communicate with each other, or to find for food, or even to heed impending danger. Sound waves or sound speeds in the water are estimated to be 1,500 meters per second, approximately 3,315 miles per hour, that’s over four times faster than in gases.
The speed of sound can vary through three factors: temperature, depth and salinity. Through the increases of those three elements, the speed of sound also goes up.