ive seen goliath tiger fish in the pet stores they do not seem that aggressive BUT AGAIN they are just youngsters i have no idea who on earth has a tank that can fit such monsters??
Youtube has a many many sick videos of animal cruelty and abuse, I do not know why it is allowed and why youtube does not stop such things. BUt there is are a lot of sick videos not just involving fish. THere was a sick vid of a pitbull killing a cat and the cat was fighting for its life in such a ferocious manner there was so much time for someone to get in and stop it but no one did. People are sick a lot of people are sadists and like to watch other animals suffer. I keep 6 tanks if something starts to get picked on and beaten up i will pull it out heal it and sell it. I dont just leave things in thet ank to get tortured to death by another fish. Not even goldfish if i use feeders they just get swallowed quick. I think its just as sick to let a puffer slowly pick apart a large goldfish.