Hi, I bought from the internet, additions to my CUC which was a common orange starfish and an Arrow head crab. The crab is fine but the star fish which was quite large vanished from day one which was approx 1 month ago. I have 2 sand shifting starfish also and see them all the time.
Will it pollute my tank if it has died some where. I am checking my water regularly and everything is normal.
Thanks for any ideas.