Monday, April 25, 2011

Silver Arowana

Osteoglossum bicirrhosum
The Silver Arowana is a bony fish indigenous to the Amazon and a handful of other rivers in South America. What is so remarkable about them, and their family, is that they are considered to be an ancient group of fish. Fossilized ancestors have been uncovered that show these fish have remained relatively unchanged for 150 million years!

Silver Arowanas are quite large, and can grow almost 4 feet long! They are covered with large, pearly scales and have an elongated body with a tail that is tapered off. They swim about near the surface, and have an upturned jaw that lets them open up and snatch things floating on the water. Silver Arowanas are carnivores that will eat just about anything that they can fit in their mouths. They also have the ability to jump several feet out of the water to catch prey.

Silver Arowanas are mouth-brooders. After the female lays her eggs, the male will incubate them in his mouth until they hatch nearly two months later!

Some experienced aquarists keep these fish as pets, and they are not recommended for novices. They require tanks that are 250 gallons in size, and the tanks need to stay covered, otherwise they might jump out!

IUCN Status :  Not Listed
Location : Amazon flood plain, South America
Size : Length up to 45in (114cm)
Classification : Phylum : Chordata -- Class : Actinopterygii -- Order : Osteoglossiformes
Family : Osteoglossidae -- Genus : Osteoglossum -- Species : O. bicirrhosum

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