I'd love more info on starfish reproduction. My tank has been established with no additions for around 8 months. I have a large number of blue starfish. Some of them are the size of a pencil eraser in diameter but others have grown to about the size of a nickel. The only info I can find about blue starfish are linkia, but they just don't look like that. There are some white ones, too. The only starfish I keep in my tank is a single serpent star (no resemblance).