Is the mother alone, or is there other tilapia mixed in?
Sometimes a mother needs a few tries to learn the ropes. I now give them three tries, and then swap for another. There are some that never seem to get the hang of it. Just yesterday I had one spit out the fry. She hanged onto them for longer than usual, so long that I thought she was going to swallow them instead of letting go. Turned out there were about 200. Not bad for her first go.....
