Arowana, also known as aruanas or arawanas or "bonytongues" or "arowana", is the spectacular freshwater bony fish of the Osteoglossidae family. Eulaliopsis usually grows to 3 to 4 feet in captivity. There are six known arowana species distributed in Asia, Australia, Africa and South America. Common in the local aquarium exports are adolescents or young people of the silver, red and gold species belonging to the species.
The head is a bone, and its slender body is covered by large, heavy scales with a mosaic pattern of canals. The dorsal and anal fins have soft light and are based on long, while the pectoral and pelvic fins are small. The name "bonytongues" comes from the dentate bone on the floor of the mouth, the "tongue", with teeth that bite the teeth on the top of the mouth. Fish can take oxygen from the air by inhaling it into the swimming bladder, which is lined with capillaries such as lung tissue. Arapaima is a "mandatory air respirator."
Arowana grows quickly, but gender differences are difficult to detect at an early age, and only become apparent when the fish is more mature around 4 years old, about 17 to 23 inches. Males usually have a shallower body depth, larger heads and mouths, longer anal fins, stronger color than females, and more aggressiveness in food competition. Females tend to be slightly larger and larger, especially during the mating season.
Some of these bone-like nerves show extensive parental care. Arowanas nest and protect larvae after hatching. Some of them are stutterers, and hundreds of eggs are hidden in their mouths. Arowana usually stay in the mouth of a parent for one to two weeks, or until their yolk sac disappears. The fry can then make several exploratory trips outside of the parents to investigate the surroundings before leaving permanently. Juvenile fry require extra care because they are particularly vulnerable at this stage of life.
The ashes are carnivorous and are usually specialized surface keepers. It slides gracefully and effortlessly in the water, moving at power and lightning speed. They are also excellent jumpers, and the Osteoglossum species have reportedly jumped more than 6 feet [about 2 meters] above the surface of the water, picking up insects and birds from the hanging branches of South America. There are rumors that they can capture prey like big flying bats and small birds. As we all know, adult fish can eat almost anything that can be put into the mouth. Young arowana can be fed like saltwater shrimp or red worms. Arowana prefers live food, but it also accepts frozen or processed foods. Balanced diets include sputum, clams, frogs, shrimps and small fish such as guppies, supplements such as vitamin-rich krill. , as well as granules and flakes, and so on.
Arowana will be combined in groups of five to eight, and any minority may show signs of domination and aggression. They are compatible with other semi-aggressive fish that are not adapted to the mouth.
Culturally, arowana is often used in feng shui to bring good luck to the Chinese. They have the look and majesty of the Chinese dragon, which is a symbol of good luck and prosperity.
Orignal From: Arowana fish facts
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