Need help identifying the following picture. On the glass in my frag QT tank and there is a bunch of them on the rock and glass. Thought it might be coraline algae, but after finally taking a closer look, it’s something else. The size of the one in the picture is just under 2 mm. I have cerith, astrea, trochus and bumblebee snails in the tank. Hoping it could be a baby snail, but afraid of what it really is.