Ruin chitters, he swims quickly around his tank, which his tank covers a whole room, 1. He's very big, 2. He's the most dangerous Mer so he has to have his own room with his tank so he doesn't hurt another Mer Ruin: "stupid humans, I will kill the next one that goes in my tank.., it's mine" he's very possessive of his tank, mainly because his large trinket and treasures