I have 2 starfish, one red linkia and one orange linkia. The orange linkia is very active it moves around the tank alot. The red one however moves very little. Should I be feeding these guys? Is the orange one hungry? They are doing well I have had them for 4 days now, I love them I don't want them to be hungry all the time. You know I was also noticing they both have 6 arms. Aren't they supposed to have only 5?