Thanks. Did want to get more nassarius snails but the smaller ones. These were all they had and I did like the leopard pattern on them.Red this goby sifts non stop, he was the only one that one sifting out of the five in the tank. The clams, having a little trouble getting them positioned where they look good but they keep pointing back. I don't want to move them to much. One of them has now anchored it's foot through the three inches of sand to the bottom glass, so hes staying for now