I’m nervous. That’s not an unusual feeling for me when embarking on a challenging dive, yet I am in only two metres of water, the sea is flat calm, and there is no current to impede my progress at all. Indeed, the source of my apprehension lies just beyond the tunnel that I’m cautiously making my way through. I will soon emerge into a shallow pool known as Mirror Pond, and it is here that saltwater crocodiles are frequently sighted.

A dark cloud developed ahead of me. Curious, I swam nearer to investigate. The cloud billowed getting bigger and darker. Inside flashes of silver struck like a highveld thunderstorm. The cloud undulated with tumultuous movement. It was massive. As it twisted towards me I made out the characteristic shape of barracudas—the long sleek body, dark chevron markings and the mean looking straight jaw line. Thousands and thousands of barracuda were swimming together in tight synchronized formation.