virtually unknown in the West, but it is beloved in Far Eastern cultures. With shining metallic scales, flowing wing-like pectoral fins, and a long flexible body, this freshwater fish bears a striking resemblance to the iconic Chinese dragon. Prized in Asia as aquarium specimens, Asian arowanas are also notable for being endangered, listed on CITES Appendix I. The geological record shows them to be living fossils, virtually unchanged since they appeared about 140 million years ago, during the heydey of the dinosaurs.
Tuesday, June 29, 2010
Chinese Dragon Fish Asian Arwona Spotlight
virtually unknown in the West, but it is beloved in Far Eastern cultures. With shining metallic scales, flowing wing-like pectoral fins, and a long flexible body, this freshwater fish bears a striking resemblance to the iconic Chinese dragon. Prized in Asia as aquarium specimens, Asian arowanas are also notable for being endangered, listed on CITES Appendix I. The geological record shows them to be living fossils, virtually unchanged since they appeared about 140 million years ago, during the heydey of the dinosaurs.
Asian Arowana Types
Asian arowanas are scattered among the mainland and tropical archipelago of the Southeast Asia, including Vietnam, Thailand, Malaysia, and Indonesia. They are obligate freshwater fish that cannot travel between islands, so the populations on each island and the mainland population are isolated from each other. Each of these populations has a unique appearance:
- The super red arowana has bright red metallic scales on its sides, red fins, and a red tail, but is dark brown as seen from above.
- The red-tailed golden (RTG) arowana has brilliant gold metallic scales on its sides, red fins, and a red tail, but is dark from above like the super red arowana.
- The golden crossback arowana has gold metallic scales and a striking bright metallic gold pattern on its back, which is created by the golden color on the scale edges.
Above left: Super red arowana.
Conservation Status
CITES has authorized a small number of fish farms in Southeast Asia to breed Asian arowanas for the pet trade. Each captive-bred fish sold is documented by a certificate and implanted with an RFID microchip. Captive breeding has caused a new conservation concern: hybridization between strains, which some researchers consider to be entirely separate species. Hybrids do not match any wild population and are unsuitable for reintroduction into their native habitat.
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