Try peas. They seem to work well on the Tilapia in Lake Mead. I was snorkeling a few months ago and glanced upon a strange fish that looked like nothing that was supposed to be in the lake. A few minutes later I happened upon a school of about a dozen Tilapia. Some one must have dumped a few in the lake and they are doing well and multiplying to my suprise. I thought the water would get too cold for them to last but they must find a warm enough water sanctuary to winter. They varied in size from a couple of inches up to about a foot in length. Any ways sorry about the rambling, but try frozen peas on small hooks. they seem to love it! Good luck!