I have a small ornate bichir in my 120 with 2 clown knives, a Florida gar and an aro. I watch the clown knives come up and sniff it but they have never tried to eat it. The gar ignores it also even though it could easily eat it. It seems like the ornate has warning colors or it just tastes bad. I keep the other fish well fed on shrimp and scallops.