Answer:
The correct answer is "schooling".
Step-by-step explanation:
Schooling is a term used to describe the social behavior that some fish has to stay together in large groups and swimming together towards the same direction and in a coordinated way. Fish schooling is used for social and defense purposes, as is easier for large groups to spot and avoid predators. Fish schooling often occurs in large groups of fish and with the same species or very similar fishes. I attached the missing image.