Hydrilla is an marine fresh water flora. It is a plant that grows up to the surface in water of about 20 feet deep. Hydrillas are a familiar aquatic flora and can grow in a variety of peculiar water sorts. 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. The Hydrilla has thick branches that open out upon getting to the surface, forming mats. It might have stems as long as 25 feet submerged in water! mostly off-white or yellow in color. | The roots or Rhizomes of the Hydrilla are frequently yellowish or off-white in color. } The Hydrilla has several methods of reproduction. When it is time to multiply the Hydrilla accomplishes this in one of four ways: fragmentation, seeds, tubers and turions (auxiliary buds).
 
When equated with other plants the Hydrilla has a number of advantages. It can grow in very low light with 1% sunlight. Hydrillas absorb a great deal of foods from the water leaving little for the native plants. Hydrillas are marked as a pestilent pest because of their fast growth rate that makes them a menace to other native plants. Hydrilla is especially dangerous because it can almost entirely take over a body of water before appearing on the surface. Hydrillas will ofttimes choke out native aquatic floras because they take up so much surface area absorbing the sunshine and foods.
 
Millions of dollars are spent each year on herbicides and harvesting devices in an effort to keep this plants growth under control. Since it harms the flora around it, people can’t even fish around areas these grow. Hydrilla is responsible for slowing water flow and clogging irrigation and flood- control ducts. Swimming, yachting, and angling all are severely affected by it. Oxygen levels in waters full of Hydrilla can often drop severely.
 
The Elodea and Egeria are ofttimes mixed up with the Hydrilla. Hydrillas have one or more teeth on the undersurface of the midrib. But for Elodea and Egeria, this is not present. Due to these teeth, we feel the harshness of these plants when we rub over from its base to the tip. Also, Egeria has bigger flowers than the Hydrilla.
 
Hydrilla is consumed by macro and micro invertebrates. Species like ducks, fish, amphibians and reptilians will consume the rotted remains of the micro and macro organisms that fed on the Hydrilla. When Hydrilla dies naturally, they are rotted by bacteria and fungi and the end result is “detritus” a food for several aquatic invertebrates. Ducks ofttimes eat Hydrilla turions and tubers, but this is not a substantial source of food. Ducks will often feed on the tubers and turions of Hydrilla, but they don’t make a great diet.