Rock Bass are one of the most aggressive panfish. They will strike a variety of baits and lures, which is great for anglers who like to catch them. For some anglers, they are quite annoying though because they will go through your nightcrawlers or leeches in a hurry.
Like most sunfish, rock bass rarely exceed 2 pounds, however, rock bass as big as 3 pounds have been caught. Most rock bass that anglers catch will usually be in the 6 to 9 inch range.
Nightcrawlers are larger worms, so most of the time, you are going to be using smaller pieces of these worms when targeting rock bass. However, rock bass have no problem grabbing a whole nightcrawler.
Red worms are much smaller worms and they are the perfect size for most panfish and they are great for rock bass too.
Leeches can be very good baits for rock bass, especially if you are targeting bigger fish. The smaller leeches will do the trick.