their females have dropped over a little more than a day. Certainly I have had platies drop over the course of a week.
However, if your enormous fry is a half an inch long or larger, I wonder if it is the product of (and survivor from) a previous batch of fry. People have been astonished by the ability of a fry (or several) to hide away and appear when larger. I even pulled close to a dozen fry (of another species) from under a filter plate.
When stories of fry survival start up at a gathering of fish heads, it almost sounds like tall tale time. :)
What's that line from Jurassic Park? "Nature will find a way." ;)
All the best!
unc
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