My wild silver saum locks jaws with its umbie tankmate while Some Amphilophus species, Crenicichla cincta, and ex-"Cichlasoma" salvini watch. The umbie looked like it had stronger jaws, but the saum was being way more aggressive and seemed to have an overall advantage. Anyway, here's my crappy pics and, as an added bonus, my first video ever:
http://www.youtube.com/watch?v=FedW45DALlY







http://www.youtube.com/watch?v=FedW45DALlY






