When I had big Clown Loaches in with one my Oscars they used to steal the worm right out of the Oscar's mouth lol Then they'd chase each other around the tank stealing it from each other, hilarious.
when we were doing digging up the yard and expanding the driveway we came across a bunch of earth worms and all we did was wipe most the dirt off and drop em in the tank. the Oscars ate most of em.. not many made it into the pbass..
Worms are a good source of Protein for your Fishy! And i Think it makes them from faster from what i have heard... and liek some one said posted above =D Just make sure the location of ur earthworm quest does not have pesticides =^_^= mmm Yummy! WormS! =^_^=