I Have A Question About Guppy And Platy Fry

[dgerow3]

There are those of you who have had many fry drops and i am wondering if it is common for guppy fry to swim near the top of the tank once born where as platy fry seem to stay near the bottom once born?

 

[helterskelter]

Thats perfectly normal.

It's mainly to do with the amout od air in the swim-bladder's.
If little gas then the will stay lower in the water.