The Otocinclus affinis, also known as Otocinclus catfish or simply Oto cat is a small south american fish native to Brazil where it can be found in heavily vegetated streams and rivers. According to many, the Otocinclus catfish is the perfect algae eater and this is probably one of the reason why it became so poppular over the years.

Crossocheilus siamensis, also known as Siamese Algae Eater or simply SAE is a freshwater fish in the Cibrinidae family (carp family). Native to the Malayan peninsula, the Siamese Algae Eater is a bottom-dwelling fish that lives in streams and rivers…

Aequidens rivatus, also known as Green Terror, is a medium-sized South American cichlid native to Peru and Ecuador where it can be found in warm coastal streams and rivers.The Green Terror is a deep-bodied, oval-shaped fish with a pronounced head. Like many cichlids, mature males will develop a distinctive head bump. Adult males can reach

The Thorichthys meeki, or Firemouth cichlid, is one the most popular cichlid in the aquarium trade. The Firemouth cichlid originates from the Yucatan peninsula of Mexico where it can be found in shallow sandy shores along slow moving rivers where driftwood and rocks are plentiful.

The Rocio octofasciata, or Jack Dempsey cichlid, is a fresh water fish native to slow moving waterways in North and Central America. The Jack is common in swampy, warm sand bottomed canals, drainage ditches and canals in Guatemala, the Yucatan, Honduras and Mexico.