Re: Frog eggs underwater on glass?
At first I thought this might have been a mischievous trick question, as the snail neonate visual is quite clear, perhaps more so to those who have encountered these flattish, semi-hard little disks in aquaria, not too far from the water line.
Some snails species come in as babies, in anacharis bunches and other plants but most are 'dwarf' species the name escapes memory but large adults rarely surpass the size of a dime.
Their presence in small situ never warrants more than manual culling and they are nocturnal so easier to find at night. A leaf of greens especially romaine will attract them as will bottom feeder tablets in a tipped jar.