Algae eater is a common name for many bottom-dwelling fish that feed on algae. Algae eaters are important for the fishkeeping hobby and many are commonly kept by hobbyists. Some of the common and most popular freshwater algae eaters in aquariums including Gyrinocheilus, Crossocheilus siamensis, Jordanella floridae and any loricariid catfish.

Pterophyllum scalare, most commonly referred to as angelfish or freshwater angelfish, is the most common species of Pterophyllum kept in captivity. It is native to the Amazon Basin in Peru, Colombia, and Brazil. Particularly to the Ucayali river in Peru, the Oyapock River in French Guiana, the Essequibo River in Guyana, the Solimões, the Amapá, and the Amazon rivers in Brazil.

Arowanas are freshwater bony fish of the family Osteoglossidae, also known as bonytongues (the latter name is now often reserved for Arapaimidae). In this family of fish, the head is bony and the elongated body is covered by large, heavy scales, with a mosaic pattern of canals.

Betta /ˈbɛtə/ is a large genus of small, often colorful, freshwater ray-finned fishes in the gourami family (Osphronemidae). By far the best known Betta species, however, is B. splendens, commonly known as the Siamese fighting fish.

The bichirs and reedfish (also called ropefish) comprise the Polypteridae, a family of archaic-looking ray-finned fishes and the sole family in the order Polypteriformes. All species occur in freshwater habitats in tropical Africa and the Nile River system, mainly swampy, shallow floodplains and estuaries.Bichirs are considered the sister group to all other extant ray-finned fishes.

Brackish water or briny water is water that has more salinity than fresh water, but not as much as seawater. It may result from mixing of seawater with fresh water, as in estuaries, or it may occur in brackish fossil aquifers. The word comes from the Middle Dutch root “brak”. Certain human activities can produce brackish water, in particular civil engineering projects such as dikes and the flooding of coastal marshland to produce brackish water pools for freshwater prawn farming.

Cichlids /ˈsɪklᵻdz/ are fish from the family Cichlidae in the order Perciformes. Cichlids are members of a suborder known as Labroidei, along with the wrasses (Labridae), damselfishes (Pomacentridae), and surfperches (Embiotocidae). This family is both large and diverse. At least 1,650 species have been scientifically described, making it one of the largest vertebrate families.

What you see is what you get (WYSIWYG) Flower Horn selection.

Danio is a genus of small freshwater fish in the family Cyprinidae found in South and Southeast Asia, commonly kept in aquaria. They are generally characterised by a pattern of horizontal stripes, rows of spots or vertical bars. Some species have two pairs of long barbels.

An eel is any fish belonging to the order Anguilliformes, which consists of four suborders, 20 families, 111 genera and about 800 species. Most eels are predators. The term “eel” (originally referring to the European eel) is also used for some other similarly shaped fish, such as electric eels and spiny eels, but these are not members of the Anguilliformes order.

Parambassis ranga, commonly known as the Indian glassy fish, Indian glassy perch or Indian X-ray fish, is a species of freshwater fish in the Asiatic glassfish family Ambassidae of order Perciformes. It is native to an area of South Asia from Pakistan to Malaysia.

Gobies are fishes of the family Gobiidae, one of the largest fish families comprising more than 2,000 species in more than 200 genera.[1] Most of them are relatively small, typically less than 10 cm (3.9 in) in length. Gobies include some of the smallest vertebrates in the world, such as Trimmatom nanus and Pandaka pygmaea.

The dwarf gourami (Trichogaster lalius) is a species of gourami native to South Asia. The dwarf gourami is native to Pakistan, India and Bangladesh. However, it has also been widely distributed outside of its native range. It inhabits slow-moving waters in rivulets, streams and lakes, occurring in areas with plentiful vegetation.

Gouramis or gouramies /ɡuːˈrɑːmi/ are a group of freshwater perciform fishes that comprise the family, Osphronemidae. The fish are native to Asia, from Pakistan and India to the Malay Archipelago and north-easterly towards Korea. The name “gourami”, of Japanese origin, is also used for fish of the families Helostomatidae and Anabantidae.

The guppy (Poecilia reticulata), also known as millionfish and rainbow fish, is one of the world’s most widely distributed tropical fish, and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing.

Knife fish has a unique “knife blade” body shape and undulating bottom fin allowing them to swim backwards making them fascinating additions to the aquarium communities. Knife fish can be placed in two main groups: The majority belongs to the Gymnotiformes and are found in Central and South America which include ghost knives, banded knives and glass knives. The minority belongs to the Notopteridae which are native to Southeast Asia and Africa which include featherfin and clown knives. Most knife fish have the ability to generate and receive electrical discharges, which they use for navigation, locating prey and communication.

Koi or more specifically nishikigoi, literally “brocaded carp”), are ornamental varieties of domesticated common carp (Cyprinus carpio) that are kept for decorative purposes in outdoor koi ponds or water gardens. Koi varieties are distinguished by coloration, patterning, and scalation. Some of the major colors are white, black, red, yellow, blue, and cream.

What you see is what you get (WYSIWYG) Koi selection.

Needlefish (family Belonidae) or Long Tom are piscivorous fishes primarily associated with very shallow marine habitats or the surface of the open sea. Some genera include species found in marine, brackish, and freshwater environments (e.g., Strongylura) while a few genera are confined to freshwater rivers and streams, including Belonion, Potamorrhaphis, and Xenentodon.

The oscar (Astronotus ocellatus) is a species of fish from the cichlid family known under a variety of common names, including tiger oscar, velvet cichlid, and marble cichlid. In tropical South America, where the species naturally resides, A. ocellatus specimens are often found for sale as a food fish in the local markets.

Platy is a common name of freshwater fish in the genus Xiphophorus that lacks a “sword” at the bottom of their tails. Both species are livebearers, similar to other fish of the family Poeciliidae, such as the guppy and molly. Platies are native to the east coast of Central America and southern Mexico.

The pond loach, dojo loach (ドジョウ dojō), or oriental/Japanese weather loach (Misgurnus anguillicaudatus), is a freshwater fish in the loach family Cobitidae. They are native to East Asia but are also popular as an aquarium fish and introduced elsewhere in Asia and to Europe, North America and Australia.

Poecilia sphenops is a species of fish, of the genus Poecilia, known under the common name molly; to distinguish it from its congeners, it is sometimes called short-finned molly or common molly. They inhabit fresh water streams and coastal brackish and marine waters of Mexico. The wild-type fish are a dull silvery color, often sprinkled black all over.

Rasbora is a genus of fish in the family Cyprinidae. They are native to freshwater habitats in South and Southeast Asia, as well as southeast China. A single species, R. gerlachi, is only known from an old specimen that reputedly originated from Africa (Cameroon), but this locality is considered doubtful.

Freshwater sharks are sharks able to live in freshwater lakes and rivers, including the river sharks, Glyphis, true freshwater sharks found in fresh and brackish water in Asia and Australia. A number of freshwater cyprinids (which are bony fish and thus quite unrelated to sharks) are also commonly called “freshwater sharks”, “sharkminnows” or simply “sharks”, particularly in the aquarium fish trade

The snakeheads are members of the freshwater perciform fish family Channidae, native to parts of Africa and Asia. These elongated, predatory fish are distinguished by their long dorsal fins, large mouths, and shiny teeth. They breathe air with gills, which allows them to migrate short distances over land.

A tetra is one of several species of small freshwater fish from Africa, Central America, and South America belonging to the biological family Characidae and to its former subfamilies Alestidae (the “African tetras”) and Lebiasinidae. The Characidae are distinguished from other fish by the presence of a small adipose fin between the dorsal and caudal fins.

L-number pleco consists of different genre and species but commonly referred as pleco. It can be distinguished based on the visual recognition and morphological characters. L-number pleco represent all the Loricariidae species. They were also known as “armoured catfish” due to their large bony plates that cover their body. The L numbers and LDA numbers came about as a means to universally identify Plecos which have yet been described scientifically because the discovery was so massive and rapid. ?It also avoids confusion where by different collectors may give different common names to the same fish. As of date, we have about 400 L numbers.