Weather Loach

Mom had to get a bigger tank yesterday because sadly 10 of our fish died because the tank wasn't big enough. Today she went and got some more fish to replace the ones she lost. She got two of these things called Weather Loaches. This confused me a little bit because I didn't know fish could predict the weather! Mom explained that they feed on the other fishies poop and food that floats to the bottom of the tank and they will help keep the tank clean. That still doesn't really explain as to why they are called Weather Loach though!? ... Maybe I'll figure it out when I'm older!!