Could be a limpet or stomatella snail. Tough to tell from just a view of the foot. Also looks like lots of eggs on the glass, probably from the same animal.
Could be a limpet or stomatella snail. Tough to tell from just a view of the foot. Also looks like lots of eggs on the glass, probably from the same animal.
That's the back side of it. It appears to be hard so I've ruled out a flat worm. It hasn't moved much so I didn't think Stomatella was a option due to the fact that they move a lot. And those are those tiny little white fan fan worms on the glass.