They make good trolling strips, are good AJ baits, work well for chunking for tuna and are great shark baits too. They do good in a crab trap and also are a good pin fish bait. They are also not too bad to eat if you bleed them! Nothing like a real tuna but if you prepare them right, you will be happy with the results.
I slice most of the meat off the bonito filet so it is only 3/8 inch thick and then salt it with Kosher salt. The salt preserves it so it can be repeatedly thawed and refrozen. It also makes it tough. Good for strip baits for trolling, cut bait for triggers and grouper bait. Most fish will eat it. Cheap and holds up much better than squid.