I have been trying now for almost 9 months to get my small fire eel off of bloodworms and onto nightcrawlers and 3 days ago he took a very small nightcrawler and one a little bigger yesterday and then a big one today. He has been big enough for awhile, he is 10" but has been stubborn and I couldn't stop the bloodworms because of the elephant nose but today he only went for the nightcrawler and left the bloodworms alone. I will never get another eel to small to eat worms it is a pain in the butt to get them off bloodworms