Snail ID

[sparkiesharkie]

Hello!

I was feeding the kids this morning and noticed about 10 of these little guys in my tank- I did not buy them…. The only snails I have purchased are nassarius snails and cerith snails- my cerith reproduce pretty well but this is a new guy and his friends- party crasher or free CUC?

Planted macroalgae 20 gallon mixed reef

Thanks all!

 

[shakacuz]

likely collonista, but too small and blurry to tell once zoomed in.