One of my yo yo loaches is stuck in a piece of aquarium decor. He tried to swim out through a hole that is to small and wedged himself in there. He has been struggling to free himself. Unfortunately it hasn't worked. The decoration is made of hard plastic. I don't think I can cut it. Even if I could figure out how to, I'm pretty sure the fish would end up injured. I tried to very gently push him backward, it didn't work. I'm really out of ideas and wondering if the most humane thing to do would be to euthanize him. If anyone had other suggestions I could try I would be very grateful.