good or bad hitchhiker?

[Janchez]

hello yhere it seems i got a couple of hitchhikers from some live rock i bought
and im wondering if they are good or bad.they only come out when the lights
are off but all of my inverts are thriving and doing good so i wanted to see what your guys thoughts are.

[amcarrig]

1st picture is of a mini-brittle star. Reef safe and a good detritivore. The 3rd is a stomatella snail which is also harmless. I have no idea what is in the 2nd pic. Could you describe it or take a clearer picture with the flash maybe?

[Jason McKenzie]

I think the second pick is a black Limpet. I have 4 of them that were hitch hikers they eat algae mainly. Good for the tank reef safe

J

[Janchez]

sweet didnt want to have to pick them out