So I noticed yesterday that my galaxia coral had what looked like bubble algae on it so I took out of tank and got it off and then noticed this creature that looks like a Rolly Polly gliding under the plug . It has a hard grey shell that has some dark markings on the front and back of shell. It instantly reminded me of the prehistoric isopods you see at the big Aquariums . Any idea what this guy is ? Never know what I will find in this tank lol