Looks a bit like a terrestrial plant, similar to a "Pothos" type I have growing mostly above the water, although it has sprouted submerged leaves.
Above are leaves that grow above the waters surface, and are more elongate.
Below, a shot taken from outside the glass, of growth below the waters surface, they are more ovate in shape when sprouting under water
Many of these tropical species can take temporary inundation, but the leaves eventually melt away underwater.
Below, camera held above, shooting at underwater growth.