I’ve never tracked a fish by the Earth's magnetism, but I do keep an eye on the patterns they leave in the water. Those creatures seem to have a natural compass that guides them—sort of a built‑in GPS that’s been fine‑tuned over millennia. It’s one of those subtle tricks nature uses, and if you’re patient enough, you can learn to read the signs just as well as any man‑made device.

I’ve noticed a few cues that repeat on the water’s surface. A sudden darkening on the horizon often lines up with a current turning that carries food downstream—like a ripple in the color that tells you something’s moving. And when a school of baitfish flashes a pale, almost silver streak across the surface, that’s usually right before a predator swoops in. The ocean’s rhythm is subtle, but if you watch the waves and the light, you start to hear its pulse.