I've never even heard of blood gouramis. I tried searching, but couldn't even find a picture on the net. Have you seen one? Is it dwarf or regular? I have seen dwarf red gouramis that are a deep blood reed at the tail and fade into a creamish-pink at their heads at my LFS
Before I got any gouramis, I heard from a few people that they can be very aggressive toward other fish, but the only problems I have had is with one specific male. He is a lavender gourami and has a tendency to beat up on and nip at anyone who come near him or, whoever he feels like chasing if he's bored.
It's interesting because just last night, i saw him chasing one of my dwarf neon gouramis and then suddenly, both of my dwarf neons were chasing him. I guess he got a bit of his own medicine.
But anyway, no one been seriously injured, just nipped at a little bit. Boys will be boys. Hopefully the spunky little guy will make me some babies soon