A group of fish is called a "school." Schools of fish exhibit complex social behaviors, swimming together in cohesive groups, often for protection against predators and increased foraging efficiency. There are different types of schooling behaviors, ranging from loose aggregations to tightly coordinated formations depending on the species and environmental conditions. Schooling can make fish appear larger and more intimidating to potential predators, as well as provide benefits in terms of finding food and mating opportunities. Some fish are solitary, while others are highly social, depending on their species and habitat.