That would be telling!!!
Actually, these types of killies, especially the annulatus are surface dwellers, and the fry from day one are always at the top.
They must be pretty hardy to have survived being unceremoniously dragged out of the tank in some riccia, biffed into a ziplock bag, sit in my bag most of the day, stuffed into a cardboard anti-crush construction that I had to make for the envelope with the bag in it, squeezed into the post box because it must have been borderline 20mm thick, transported to the mail sorting centre in a van, sorted, then thrown in a bag and placed on a truck up to Auckland then delivered to you, possibly on a scooter or pushbike.
Not bad, aye?