YUP! So very true Bennie, here's some more...
"... It is important to recognise from the outset that sound travels five times faster in water than it does in the air, at rate of approximately one mile per second. Because water is an excellent conductor of sound waves but a very poor transmitter of light waves, fish have been endowed with a exceptionally good sense of hearing...
... The hearing apparatus of a fish is a highly developed sense organ, so sensitive that it can sense the noise of a worm wiggling on the bottom...
... Unlike us, fish do not have eardrums and the ears are not open to the water on the outside. Sounds are transmitted directly from the water through the skin, flesh and bone of the fish's head to the ear...
... In addition to their ears, fish have a second sound-detecting organ known as the lateral line which is unique in the animal kingdom. This organ senses the strong, low frequency vibrations in the water and is important to a fish in pinpointing the source of the sound. Some scientists refer to the lateral line as "the sense of distant touch." It's almost as if a fish could reach out and feel...
... While the lateral line handles the near-field sounds, the ears concentrate on far-field sounds. These far-field pressure waves, sensed by the ears, are capable of travelling through the water for many miles and provide the fish with long-range hearing...
... The lateral line thus supplements the ear by providing a super-sensitive system for detecting close disturbances in the water...
... One peculiarity of the lateral line sensing system is its sensitivity for larger objects. This means that a larger predator or baitfish can be located at a greater distance and with greater accuracy than a smaller one. A preyfish can gain the advantage over a predator when both are using the lateral line for sensing in murky water or at night, because the smaller fish will hear the larger one first....