Not sure on the clam, he is two years old and I got him when he was about 2" across. He is about 10" now
Fish I have are mated pair of maroons, Blond Naso, Purple Tang, Foxface, Scopus tang, 2 yellow tang, 2 bahai cardinals, Coral Beauty, 6 line wrasse, 14" engineero goby (what a joy he is...