How does 三间对峙 translate in the context of a fish tank？

[xifbk]

I thought 三间 refered to rooms, however this youtube video seems to be referring to fish in a tank?

[HashiriKata]

三间 is the name of a type of fish. 三间对峙 here means these fish are confronting one another.

[skylee]

間 = 間條 = stripe(s)

三間 = three stripes

I think the fish is confronting its own reflection ...

[xifbk]

Thanks guys, with the word fish as a clue, google helped me find this page (:

http://www.fishinking.com/cat_lib_freshwater/Cichlidae/753.html