I came home last night and my African Mudskipper, Moko was dead. I am sad. He looked fine the day previous and his body looked fine (but dead) so I don't know what happened. He and my other skipper rumbled quite often but never really seemed to hurt each other. He was plump and his skin looked good so it is a mystery. I just bought a 60G tank last week because their tank had started a salt creep in a couple places. But luckily the LFS says they will take the tank back because it is still sitting in the middle of the floor in my living room.