This episode explores the diverse world of fish, focusing on their social structures, behaviours, and life cycles. It explores the differences between shoaling and schooling fish, highlighting how they use these strategies for protection, foraging, and mating. We then delve into the remarkable migration patterns and spawning behaviours of salmon, as well as the unique characteristics of sharks as apex predators.

This program emphasises the crucial role that fish play in their ecosystems, acting as keystone species and supporting a wide array of other organisms. The various modes of reproduction, from external fertilisation to live birth, and the challenges faced by young fish in their early stages of life will be covered. Viewers will take away a comprehensive understanding of the complex and interconnected world of fish, showcasing their remarkable adaptations and the intricate web of life in which they are embedded.

Animal Society is a documentary series about the different social behaviors of various animal groups and individual species, from seabirds to insects, schooling fish to great cats.