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. The dorsal and anal fins have soft rays and are long based, while
the pectoral and ventral fins are small. The name "bonytongues" is
derived from a toothed bone on the floor of the mouth, the "tongue",
equipped with teeth that bite against teeth on the roof of the mouth. The
arowana is a facultative air breather and can obtain oxygen from air by sucking
it into its swim bladder, which is lined with capillaries like lung tissue.
What is mind blowing about
this fish is the fact that they have been seen jumping as far as 6 feet into
the air for their prey. They are
native to the Amazon River system, and are know to have grown as long as 1
meter long in captivity and 1.2 meter in the wild. When kept in an aquarium, it
should be securely covered, to prevent the fish from jumping out. The are known
as 银龙鱼
('Silver Dragon Fish') in Chinese, and are populat with East Asian aquariumists
for their resemblance to a Chinese dragon, a good luck symbol. Source: Wikipedia
Photo Source: Collected from Internet
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