The neuromast is a mechanoreceptive organ which allows the sensing of mechanical changes in water. ... The receptive hair cells are modified epithelial cells and typically possess bundles of 40-50 microvilli "hairs" which function as the mechanoreceptors.

What is a neuromast cell?

Neuromasts consist of sensory cells, which detect water movement by deflection of cilia, and associated support and mantle cells. Neuromasts are innervated by axons extending from ganglia located in the head.

What is the purpose of a lateral line system?

The lateral line is a sensory system that allows fishes to detect weak water motions and pressure gradients.