A shoal is a loosely organised group where each fish swims and forages independently but is attracted to other members of the group and adjusts its behaviour , such as swimming speed .
Fish remains close to the other members of the group .
A shoal is a loosely organised group where each fish swims and forages independently but is attracted to other members of the group and adjusts its behaviour , such as swimming speed , so that it remains close to the other members of the group .