Brian figured that if he could solve the technology and logistics problems required to anchor a fish farm 10 or 20 miles offshore, where swift currents carry away and disperse the waste produced by concentrated fish stocks, it would allow the farmed fish to swim in the same fresh water as their wild cousins-the best of both worlds.

FORBES: Regulatory Uncertainty Drives A Fish Farmer To Foreign Waters

They are not as sensitive as sharks and rays, but can detect signals of the same size as those produced in water when fish move their muscles.

BBC: Dolphin hunts with electric sense

The primitive fish mouth straining for water and finding it as my son releases it in the shallows.

NEWYORKER: The Other Place

Gustillo takes me snorkeling in a coral grove, going so far as to summon a crowd of gorgeous fish by chumming the water with hacked-up bits of less gorgeous ones.

WSJ: The Philippines's Strange Paradise