User blog comment:Chrono19/Goldfish Farm/@comment-4674838-20111222094241

Did some testing. Using crabs to push pressure plates in a 2x2 box to power 3 fish statues + lava for instant kill = 1 stack of goldfish in ~17 seconds = completely full inventory (including hotbar) in ~11.5 minutes = ~80 gold. Roughly 4.17 platinum per hour. Try it out =)