Ok I didn't know what this was and went looking - sounds like a cool little guy to have in the tank
I would name them Bill & Hillary GET IT HA
Chitons have an eight-piece shell. The hard pieces are called valves. The leathery flesh is called the girdle and the girdle holds the valves together. There are about eight hundred kinds of chitons in the world. They cling to rocks. Their foot is a wide muscular organ that helps them hold on to rocks. They are very sluggish. They eat algae. They eat with their radula. Radula is a ribbon of hard teeth. The chitons grow 1/3 to 12 inches.