Yellow Water Lily
Nuphar advena
Size: to 9" (leaves)
Habitat: rooted in muddy bottoms with leaves floating at the surface
Yellow is the most common color, but you may also find white and pink.
Many insects which are terrestrial as adults have aquatic larvae. Notorious among these are mosquitos. Most aquatic insects have aquatic larvae.
Caddisfly Nymph
Trichoptera
Caddisfly larva build tube-like cases of sand, sticks, leaves, or other material.
More: Aquatic Larvae ...