Why these predator fish go for them is a mystery as often they look nothing like the prey fish.

Can we come up with a food for fish that won't deplete wild prey fish?

This implies a large supporting biomass of small prey fishes and invertebrates.

Golden Dorados are piscivores, eating a wide variety of prey fish.

They are regularly seen picking up objects to use as a fishing lure, attracting prey fish.

They are often designed to mimic local prey fish or large local insects.

For example, prey fish have ways of using colouration to make it more difficult for visual predators to see them.

This panics the prey fish, and their schooling becomes chaotic, leaving them open to attack by the trevally.

The giant otter seems to prefer prey fish that are generally immobile on river bottoms in clear water.

One possibility is that feeding efficiency is increased by multiple predators making strikes on the same prey fish within a short time of each other.