Adult/Juvenile – Juveniles are orange with white markings and are usually about 2-3 inches. Adults change color and look completely different than the juvenile form. Adults have a dark orange-brown/blue body with blue dots near their yellow tail. Sub-adults show up from time to time and usually have the adult color with some of the white markings of the juvenile. They will dive into the sand, either to sleep or when they’re frightened. They can go missing in the tank for days and then reappear all of a sudden. Adults reach about 1 foot in length, though you can find smaller and larger adult sizes for sale. Because they eat invertebrates and dive into the sand, they may not be suited for reef tanks. If you’re going to keep one in an FO or FOWLR tank, you should have sand for them to dive into.