Fish or snail egg? I googled and looks like fish to me. Or is it something else entirely? I've identified two so far on the same plant as I was cleaning off the algae.
I have harlequins and panda corys in the tank, and a couple of snail invaders.
Edit: if it's not the snails, I'm guessing it's probably the harlequins as they like to lay eggs on broad leaf plants.
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