How to visually distinguish a shark from a Napoleon wrasse by drone

When scanning for marine wildlife from a drone, Lauren Landers Sailing looks for a small dark spot that is moving. The key to telling a shark apart from a large Napoleon wrasse comes down to body shape and movement: a Napoleon wrasse is thick and does not move like a shark does. Even if the animal is big, the silhouette and swimming style give it away. Getting familiar with what regularly inhabits a specific spot helps enormously, because you start to recognise the locals, like the Napoleon wrasse that hangs out in the middle of the pass.