River

The first sonic experience on Earth was a submerged soundscape. 'Waves whipped into surf, pelting the first rocks as the amphibian ascends from the sea. And although he may occasionally turn his back on the waves, he will never escape their atavistic charm.' - Acoustic ecologist R Murray Shafer.

Sound is the most prominent sensory capacity beneath the surface of the water.

Fish can hear particle motion. The lateral line is a sensory system that allows fishes to detect weak water motions and pressure gradients. Hundreds of neuromasts, a sensory structure of ciliary bundles of hair cells spread over the head, trunk and tail fin, connect the Javelin Grunter (Pomadasys kaakan) with the surrounding aquatic world.