[Peter Finke]

Drosophila, as useful they are for surface-feeding fish, are useless for Parosphromenus. In nature they normally don’t feed from the water surface. In our tanks it might happen sometimes because the tank-height is much lower than their ecological niche is in nature: their activity extends more in the depth than to the surface (see their colours, see their normal neglect of their labyrinth). They are often caught in depths of more than 1 meter. So they might catch the one or other fly in our tanks, but it does not fit in their behavioural scheme.