Hydrilla is an aquatic fresh water plant. The Hydrilla will grow to the waters surface from a depth of up to 20 feet. This very common water flora can be found in all sorts of water: rivers, lakes, fens, springs and the like. Hydrillas can grow only a few inches in water, but they can also grow to about 20 feet deep underwater. The Hydrilla can flourish in either oligotrophic (low nutrient) or eutrophic (high nutrient) water conditions.  
 
The tolerance temperature level of a Hydrilla is 20o C to 27o C; thus, it can’t stand harsh climates. This freshwater plant, Hydrilla, branches abundantly and when it gets to the surface, it unfolds its branches and forms dense mats. The underwater stems of the Hydrilla can be as long as 25 feet. The Hydrilla roots, also know as Rhizomes, are  oftentimes than not off-white or yellowish in color. | The roots or Rhizomes of the Hydrilla are ofttimes yellow or off-white in color. } The Hydrilla has several options when it comes time to procreate. When it is time to multiply the Hydrilla accomplishes this in one of four ways: fragmentation, seeds, tubers and turions (auxiliary buds).
 
The Hydrilla has many positives on its side when compared to other marine floras. Only one percent sunshine is need for the Hydrilla to grow. These floras also take up the rich nutrients from its place so that the other native sources can’t get it.Hydrillas can grow very speedily, vying with the indigenous species, and that’s why it is considered a pestilent pest. Hydrilla is especially dangerous because it can almost entirely take over a body of water before appearing on the surface. When it covers a big area, all the aquatic floras 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. Slowed water flow and blocked up irrigation or flood control channels are as a result of Hydrilla over growth. Hydrilla impedes swimmers, boatmen and fishermen alike. Oxygen levels in waters full of Hydrilla can ofttimes drop severely.
 
Elodea and Egeria are ofttimes confused for Hydrilla. The aquatic plants Elodea and Egeria are often thought to be Hydrilla. Hydrilla can be identified by the teeth found on the underside of the midrib. But for Elodea and Egeria, this is not present. Because of the teeth, Hydrilla will feel rough. Hydrilla will feel rough due to the presence of the teeth on the bottom of the plant. Also the Hydrilla has smaller blooms than the Egeria.
 
Hydrilla is eaten by macro and micro invertebrates. Upon dying, these micro and macro organisms disintegrate and become food for other land and aquatic wildlife. When this plant dies, their rotting is done by bacteria and fungi and provides food called “detritus” for many aquatic invertebrates. Ducks frequently eat Hydrilla turions and tubers, but this is not a substantial source of food. Ducks will frequently feed on the tubers and turions of Hydrilla, but they don’t make a great diet.

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