Egeria Densa, also known as Brazilian Waterweed, is a submerged aquatic plant popular in the aquarium hobby. This plant is native to South America and is commonly found in freshwater bodies such as lakes, ponds, and slow-moving rivers. While Egeria Densa is one of the most common names used for this plant, it is also known by several other synonyms including Anacharis Densa, Elodea Densa, and the Common Waterweed. These synonyms are often used interchangeably, but they may refer to variations in appearance or geographic locations. Despite the different names, Egeria Densa remains a popular choice for aquarium enthusiasts due to its visual appeal and ease of care.