Sandamarly
Fish Fanatic
My gourami keeps arching his back and flaring his fins to another gourami....any idea whats going on?
Andrea
Andrea
What species are they? Also, what sex? These are usualy the first signs of aggression in maturing males or males competing for territory. It could be a sign your tank is over-stocked or that the gouramies are crowded. This kind of thing, dependning on species, can easily ecalate and you could end up with a full-blown battle on your hands.
Alternatively, this could possibly be a male displaying to a female (still can lead to a blood-bath dependning on species) or simply a couple of gouramies re-establishing hierarchy.
edit: What size is your tank and what fish are in it?