Discovered a rather large pod or something that was able to swim across my tank (20g with 800gph total flow at night) and follow my flashlight. He would disappear when I turned it off and as soon as it was back on he right there against the glass wiggling at it. He is skinny and long (apx a cm) reddish colored has either hundred of legs or spines and two big black eyes. I caught him and was able to get a few photos the best I could but he wiggles a bunch and is hard to focus on.