Upwelling
The major upwellings in the ocean are associated with the divergence of currents that bring deeper, colder, nutrient rich waters to the surface. There are at least five types of upwelling: coastal upwelling, large-scale wind-driven upwelling in the ocean interior, upwelling associated with eddies, topographically-associated upwelling, and broad-diffusive upwelling in the ocean interior.
Elodea
Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. "Elodea" is native to North and South America and is also widely used as aquarium vegetation. It lives in fresh water.