No.
frogs eat nymphs
Yes!They eat small fish.
Yes. Dragonfly nymphs are aquatic.
Dragonfly nymphs are found in ponds.
Some of the larger ones do, yes.
The name of baby dragonfly is Nymphs. Before Nymphs they are called Larva.
Stonefly nymphs mainly feed on leaves and algae. They must be submerged in the water though in order for the nymphs to eat them.
YES, especially mosquito larvae
Several birds prey on dragonflies. Frogs, herons, and ducks eat dragonfly nymphs. Several parasites attack dragonflies.
Hexagenia nymphs are detritivores. They filter feed bits of organic material and algae out of the water by creating a current in their burrows with their gills.
Dragonfly nymphs are aquatic and do not closely resemble the adults. See the link for a picture of a dragonfly nymph.
Turtles, large fish, and a number of birds consider dragonfly nymphs a delicay.