Trapas are annuals with creeping, floating stems and triangular, mottled dentate foliage with leaves floating on the water. The horned fruits are extensively used for food in China and other parts of Asia.Ideal for shading ponds and long roots are ideal for fish spawning.

These water plants are those that float on the surface of the pond while their roots remain submerged. These plants are beneficial in providing added shade in the water, which is important to keep direct sunlight from penetrating into the pond. This is essential during hot summer's days when algae bloom is at its peak.

Floating plants will help cover the pond and prevent these microorganisms from proliferating at a rapid rate.