Eddie it is reported that groupers are not compatible with other groupers. But fish are individuals, and no one can really tell you wether they will fight or not.
Would I put them together? NOPE!!
Thanks for the advice. I think im gonna listen. My tank is overcrowded anyways. only reason i was thinking they might get along is because they are very peaceful mine doesnt bother a soul. lol thanks again
i agree, i use to have a marine betta but he ended up missing for about half a year then just randomly showed up. i ended up giving him to a buddy because i really never saw it. but i also had a black nox angel and a black purcula at the time and he did not like them. dont know if it was because colors are some what similiar but he was fine with everyone but my two black fish. everytime they would swim by he would pop his head out and be like "aaaaaaaaaa keep walkinn get outtaa here" and opened his mouth to them. then if someone else came by he could care less. would i take the chance of getting another marine betta with one already....ehhh i would not want to go through the struggle.