Formerly in the genus Asterina, they are now Aquilonastra. There's 33-35 species, most of which are harmless. A couple species that are sometimes encountered in the hobby will harm corals and other invertebrates, although that is *sometimes* they're often benign but can be seen as a pest due to how quickly they reproduce.
Since were talking about asterina, all that I have are tan. I cant even count how many there are but in the past week I saw a black one. I plucked him and put him in the sump. Any ideas if the black one are safe?
apparently there are different experiences on this subject. Some say they have always done it and fine and some say not okay.
I inspected the chaeto bag just now and other than asterina I can see a snail as well. It looks like it comes with pests. I can not not to dip it. I know I will lose the copepods that come with it, but I also have apex pods ready in fridge from reef nutrition.
I think the risk of not dipping it is greater than dipping it. Especially, I am setting up a new tank.
So I fresh water dipped and spray with kitchen sink spray yesterday and then I dried it up with paper towel and let it sit in my tank saltwater overnight in the fridge like some people did. This is how they look like this morning when I took it out