Some photos to show the development. I am able to distinguish 4 young, that’s the highest number I have seen together, and I claim to be able to tell 4 individuals apart.
Two are of the same size, one is slightly smaller, and the fourth is still very, very tiny.
Here are the three bigger ones with their father:
And here you can compare one of the bigger ones to the “pipsqueak” (above):
The pipsqueak compared to mosquito larvae …..:
And the eyes of the little one (above) and it’s bigger brother/sister (below)
(Notice the pearl-white eye rim which already tiniest quindecim-fry show!)