A group of fish is known as the school of the same fish species that swim together and move in a synchronized manner.
Around 80 per cent of the species of fish known to be in schools. Swimming with their families makes it quicker for fish to migrate through the water, so it helps reduce friction between their bodies and the water.
The big body always confuses predators and scares them.
When they migrate in precise form, schooling fish carry about the appearance of a single huge species.