What kinds of starfish are they? Have you done anything in particular to care for them?I had a clown and yellow tail make it over 25 years. I think the youngest fish in my tank is about 10 years old. 2 starfish 1 for 8 years and the other for 20+. A scarlet crab that's 18 to 20. Hes a monster. I haven't bought any since 2006.