4. Use Large Fish for Bait: Shrimp boat trash contains all sorts of dead animals, including crabs, various species of unmarketable shrimp, and lots of different species of fish. A $20 bill will get you all you need, but be picky about what you put on your hook. "The more fish in the trash, the better," Trosset said. "Try finding bigger fish for hook baits, fish that weigh at least a half-pound or more. Sometimes the bonito will lay off the bigger fish, but the blackfin will eat them, no problem." He also says that you can toss out large, nose-hooked dead mullet or even a ballyhoo. Your hook bait doesn't necessarily have to come from the trash. If you can find puffer fish or a larger lane snapper in the trash, use those; blackfin eat them like they're candy, and bonito will usually leave them alone.