Hydrilla is a fresh water plant. The Hydrilla will grow to the waters surface from a depth of up to 20 feet. This is a very standard plant because it can almost grow in any fresh waters such as springs, rivers, fens, ditches, and lakes. Hydrillas can grow only a few inches in water, but they can also grow to about 20 feet deep underwater. This plant can grow in either oligotrophic (low nutrient) or eutrophic (high nutrient) water.  
 
The Hydrilla is suited to more mild climates as it will only tolerate temperatures between 20 C and 27 C. Upon extending to the surface, the Hydrillas full branches spread out to form a thick mat. It might have stems as long as 25 feet underwater in water! by and large off-white or yellowish in color. | The roots or Rhizomes of the Hydrilla are often yellow or off-white in color. } The Hydrilla has numerous ways of reproduction. Fragmentation, seeds, tubers and turions (auxiliary buds) are the primary ways the Hydrilla propagates.
 
The Hydrilla has many positives on its side when likened to other marine floras. Only one percent sunshine is need for the Hydrilla to grow. Hydrillas absorb a great deal of nutrients from the water leaving little for the native plants. Hydrillas are labeled as a noxious pest because of their fast growth rate that makes them a menace to other native plants. It is believed to be dangerous because it is almost unseen properly before it totally tops out a lake, pond, or a specific area. When it covers a big area, all the aquatic plants that fall under it die due to the lack of sunlight or nutrition. When Hydrilla encompasses a large area, all the other aquatic floras fail because the do not receive enough sunlight or nutrients.
 
Millions of dollars are spent each year on herbicides and harvesting devices in an attempt to keep this floras growth under control. Hydrilla harms the vegetation in the immediate area making it near impossible for fishermen to fish. Hydrilla slows down the water flow and totally overloads irrigation and flood-control ducts. Hydrilla impedes bathers, boatmen and fishers alike. When a lot of Hydrilla grows together, it can totally take down that areas water oxygen level.
 
Elodea and Egeria are often mixed up for Hydrilla. The marine floras Elodea and Egeria are frequently thought to be Hydrilla. In the case of a Hydrilla, there is one or more teeth located at the underside of the midrib. Elodea and Egeria do not have teeth present on their undersides. Neither Elodea nor Egeria has teeth on their underside. Because of the teeth, Hydrilla will feel rough. Hydrilla will feel rough due to the presence of the teeth on the undersurface of the plant. Also the Hydrilla has smaller blossoms than the Egeria.
 
Macro and micro invertebrates feed on Hydrilla. Species like ducks, fish, amphibians and reptiles will consume the decayed remains of the micro and macro organisms that fed on the Hydrilla. When Hydrilla dies naturally, they are decayed by bacteria and fungi and the end result is “detritus” a food for a number of marine invertebrates. Ducks frequently eat Hydrilla turions and tubers, but this is not a substantial source of food. Ducks will ofttimes feed on the tubers and turions of Hydrilla, but they don’t make a great diet.

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