User blog comment:Commdor/Mass Effect 3: Leviathan trailer released/@comment-1679409-20120824222359

Good find regarding Yamm and Cerberus Daily News. The planet we see in the trailers is definitely almost all water and stormy, just like Yamm. The planet from the trailer also has a few ship hulls in its oceans. If Yamm is a mining colony, then I could see some ships crashing on it. However, a couple of things make me doubt Yamm is the planet. For one thing, the planet in the trailer has jellyfish. Yamm could have jellyfish, but the codex specifically mentions arthropods; jellyfish are not arthropods. The Yamm codex entry seems to imply that arthropods and algae are about it. Second, the codex entry for Yamm indicates a planet that looks far more hostile to sapient life (e.g., poisonous algae, insanely strong hurricanes, extreme temperatures) than the planet in the trailer would appear. It certainly doesn't look like a cakewalk, but notice Shepard and Garrus aren't even wearing breather masks. I'm personally holding out hope that it's Kahje, but I know it won't be. Oh, and Yamm is a crappy name.

I also noticed the brute attacking another brute and had the same thought as you. But why would Leviathan just control one brute and not both?