Oh, man. Has it managed to eat your dad's fish? I know, that this is terrible creature, but I have even thought, that it can be so huge (2 foot) OMG. I think, it would be better to kill it and don't give to anybody. Of course, it's your business, but I ask you to read the article about this creature -
bobbit worm before you or your dad will give it to somebody. Maybe you will understand, that this worm is very harmful and you are the luck ones, that he hasn't managed to bring you harm or worse to kill all your fish. Additional, I recommend changing the aquarium, because he can be not alone. Hope all will be OK.
