At birth, to the naked eye seeing the frye in the water, they're going to look like almost any newborn fish.

It's on the early end for bluegill spawn, but nothings out of the realm of possibility.

Within a week or so, they should take on the more standard 'oval' shape of a bluegill, if that's what they are.

Excerpt from Robert Crais' "The Monkey's Raincoat:"
"She took another microscopic bite of her sandwich, then pushed it away. Maybe she absorbed nutrients from her surroundings."