Daily Archives: February 5, 2015


Why do fish shoal

As an experienced SCUBA diver I come across shoals of fish on virtually every dive, from tiny damselfish to schools of jack and even shoals of hammerhead sharks. It is well known that small fish form shoals for defence from predators, but how does this work? Surely a mass of prey is more visible and […]

A shoal of lyretail anthias in the Red Sea