Someone once caught some carp with a contraption something like this:
▒≈≈≈≈▒▒▒▒▒▒▒▒▒▒▒▒
▒≈≈≈≈▒▒.^..THIS ▒▒
▒≈≈≈≈≈X.^..AREA <▒
▒≈≈≈≈≈X.^..IS <▒
▒≈≈≈≈▒▒.^..A K▒▒
▒≈≈≈≈▒▒.^..ENNEL▒▒
▒≈≈≈≈▒▒▒▒▒▒▒▒▒▒▒▒
He would open the left floodgates, let fish in, wait till they got trapped, close the left floodgates, pump water out until it was 4/7 water (where fish and dwarves can survive without drowning), and let some animal tamers come in and lead the fish to the kennel where they would be tamed.
