Final answer:
The tiny sense organs that detect water vibrations in fish are part of the lateral line system, which involves mechanoreceptors called neuromasts distributed along the fish's body.
Step-by-step explanation:
A row of tiny sense organs that detect water vibrations in fish is known as the lateral line. This unique sensory system allows fish to sense movement, vibration, and pressure gradients in the surrounding water, enabling them to navigate, hunt, and avoid predators.
It consists of a series of mechanoreceptors called neuromasts, which are distributed along the sides of the fish's body. When water movements disturb the sensory hair cells within these neuromasts, electrical signals are generated and sent to the brain, whereby the fish can interpret these vibrations.