Species

Xenomystus nigri

The knifefish that barks, breathes air, and swims backwards with ease.

Hoplerythrinus unitaeniatus

An ancient air-breathing predator that can walk to find new water.

Scleropages formosus

A CITES-protected dragon fish that can leap clean out of an open tank.

Scleropages jardinii

Australia's own arowana, and arguably the most aggressive of the family.

Labeo chrysophekadion

A dramatically dark, shark-shaped giant that outgrows most home tanks.

Osphronemus goramy

A fish that recognizes its owner and outlives most pets in your house.

Boulengerella lucius

A torpedo-shaped ambush predator that outgrows most home aquariums fast.

Alcolapia grahami

A cichlid from one of Earth's most extreme lakes, built to survive where others cannot.

Maylandia greshakei

A rock-dwelling Malawi cichlid that rewards bold tank management with vivid color.

Megalops cyprinoides

A prehistoric, air-breathing giant that bridges freshwater rivers and open ocean.

Gambusia affinis

The notorious mosquitofish: tough, prolific, and not a friendly neighbor.

Scleropages inscriptus

The only arowana with geometric line markings etched across its head and flanks.

Chitala ornata

A prehistoric river predator that grows far larger than most tanks can handle.

Nothobranchius palmqvisti

A brilliantly colored killifish that lives fast in seasonal African pools.

Boulengerella cuvieri

A surface-hunting predator that outgrows almost every home aquarium.

Belonesox belizanus

A surface-hunting predator built like a pike, from Central American wetlands.

Serrasalmus rhombeus

A solitary, powerfully-jawed predator best kept as a single specimen by dedicated keepers.

Plagioscion squamosissimus

A riverside predator built like a torpedo, surprisingly manageable for its size.

Protopterus dolloi

A living fossil that breathes air and can crawl across dry land.

Lepidosiren paradoxa

A living fossil that breathes air, crawls on fins, and outlives most pets.

Scleropages leichardti

Australia's ancient surface predator, built for ambush and best kept alone.

Atractosteus tropicus

A living fossil from Central America that grows to canoe-like proportions.

Fundulopanchax walkeri

A feisty West African killi with a big appetite and cool-water preferences.