Have you heard of this 'goldfish swallowing'? Stupidly enough I went to the site (Which I don't advise and please let me warn you it is awful. AWFUL.) and to my still unsettled anger they were swallowing bettas too.
Of all the cruel, insane, and vicious things to do... They not only put these fish through hell swallowing them alive (and sometimes trying to vomit them back up alive) but they made a site about it to promote it and film it for people.
I give up. I want to hand in my 'human being' card and divorce this species.