Anubias aquarium plant in Thailand Anubias is a genus of aquatic and semi-aquatic flowering plants in the family Araceae, native to tropical central and western Africa. They primarily grow in rivers and streams, but can also be found in marshes. They are characterized by broad, thick, dark leaves that come in many different forms. Species can be determined by using mostly characteristics of the inflorescence. They are commonly used in aquariums, usually attached to rocks or bogwood.