Asian arowana
Large freshwater fish from Southeast Asia known for its metallic scales and cultural significance.
The Asian arowana is a large freshwater fish native to Southeast Asia, valued in aquariums and traditional culture. First described in 1840, it faces threats from habitat loss and trade, leading to endangered status and strict international regulation.
- Grows up to 90 cm with metallic scales in green, silver, gold, or red varieties.
- Males practice paternal mouthbrooding, carrying eggs and larvae in their mouths.
- Listed as Vulnerable by the IUCN and protected under CITES Appendix I.
- Culturally significant in Chinese tradition as a symbol of dragon-like prosperity.
- Native to blackwater rivers and swamps across Southeast Asia.
What it is
The Asian arowana is an ancient freshwater fish with a long body and large, elongated pectoral fins. It has a wide mouth with barbels on the lower jaw and teeth on multiple bones. The scales are large and cycloid, often displaying metallic colours like green, silver, gold, or red in distinct geographic varieties. Adults reach up to 90 cm in length. They possess dorsal and anal fins set far back on the body and a large caudal fin. The lateral line contains fewer scales than Australian relatives. Colour patterns vary by strain, with some showing metallic gold crossing the back completely or deep red hues on gill covers and fins.
Where it lives
This species inhabits blackwater rivers and slow-moving waters within forested swamps and wetlands across Southeast Asia. Its native range includes parts of Indonesia such as Kalimantan and Sumatra, as well as Peninsular Malaysia, Thailand, Vietnam, Myanmar, and Cambodia. The fish prefers shaded areas near Pandanus roots or other structures during the day. Habitat destruction has made them uncommon in areas like the Malay Peninsula where they were once widespread. Genetic studies suggest their ancestors diverged from Australian arowanas around 140 million years ago during the Early Cretaceous period.
How it lives
Adults feed primarily on other fish, while juveniles consume insects. They are carnivorous surface feeders that hunt at night and spend daylight hours hiding. Typically solitary or found in small groups, they exhibit strong parental care. After fertilization, males brood the eggs and subsequent larvae inside their mouths until the young are ready to swim independently. This paternal mouthbrooding ensures high survival rates for the small clutch of 30 to 100 large eggs. In captivity, they require meaty foods like shrimp, crickets, and small frogs, preferring food from the upper water column.
Breeding and life cycle
Sexual maturity is reached relatively late, typically after three to four years of age. Females produce a limited number of large eggs, ranging from 30 to 100 per spawn. Following fertilization, the male takes on the role of incubation by holding the eggs and developing larvae within his mouth cavity. This behaviour, known as paternal mouthbrooding, protects the vulnerable offspring from predators and environmental hazards. The young remain in the male's mouth until they have developed sufficiently to survive outside this protective environment.
Fish and people
In cultures influenced by Chinese traditions, the Asian arowana symbolizes good luck, prosperity, and power due to its resemblance to the Chinese dragon. Feng shui practices associate the fish with balancing yin and yang energies when kept in water. High demand in the aquarium trade has driven prices into thousands of dollars for rare colour varieties like the super red and gold crossback. This popularity has led to illegal harvesting and significant conservation concerns. Captive breeding programmes in Singapore and Indonesia now supply legally traded specimens marked with microchips and certificates to combat wild collection.
Status and threats
The International Union for Conservation of Nature lists the Asian arowana as Vulnerable, with a 2019 evaluation. International trade is strictly controlled under CITES Appendix I, the most restrictive category, since 1975. Habitat loss remains a primary threat, alongside pressure from the aquarium hobby. Some colour strains, particularly the super red and red-tailed golden, may be more critically endangered due to rarity and high market demand. Captive breeding initiatives aim to reduce wild capture, though unregistered farms still exist. Possession is prohibited in several US states without specific permits.
Questions people ask about Asian arowana
What does the Asian arowana eat?
Adults primarily consume other fish, while juveniles feed on insects. In captivity, they require a carnivorous diet of meaty foods such as shrimp, crickets, small frogs, and earthworms. They are surface feeders that prefer taking food from the upper parts of the water column.
Why is the Asian arowana considered endangered?
Habitat loss from environmental destruction is a major threat, making them uncommon in parts of their original range. Additionally, high demand from the aquarium trade leads to heavy harvesting. Certain colour varieties are rarer and face greater pressure due to their popularity among collectors.
How do Asian arowanas reproduce?
They reach sexual maturity after three to four years. Females lay 30 to 100 large eggs, which are then fertilized. The male exhibits paternal mouthbrooding, keeping the fertilized eggs and subsequent larvae inside his mouth to protect them until they are ready to swim independently.
What are the different colour varieties of Asian arowana?
Common varieties include the green, silver, red-tailed golden, gold crossback, and super red. Each variety is associated with specific geographic regions. For example, the super red is found in western Borneo, while the gold crossback originates from Peninsular Malaysia.
Is it legal to keep an Asian arowana as a pet?
International trade is restricted under CITES Appendix I. Legal specimens must come from registered captive breeding programmes and carry identification chips and certificates. Private possession is prohibited in some countries and US states like Florida and New Mexico without special permits.
Good reading and sources
- Asian arowana on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Asian arowana", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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