They eat small insects
No- dolphins are bigger, and bluegills and dolphins do not live in the same place.
Yes.
Bluegills eat insects, worms, tiny fish, fish eggs, even algae.
because they are blue
Bass, pike, otters, turtles, alligators, osprey, anhinga, cormorant, mink, humans.
They Have scales.
Bluegill will eat everything. If your asking this because you caught one and want to keep it as a pet, trust me it would be happier in the pond or lake it came from.
Behind that prepositon.
on a blue fish
Bluegills normally spawn in late April in the south, later in the north. June in New York and points north.
The type of fish that were actually in Hatchet were bluegills, sunfish, and perch.