brief introduction
Arowana (arowana), also known as whitebait, whitebait and arowana, is native to Amazon River Basin in South America, Nile River Basin in Africa, Australia and Papua New Guinea. Generally, they live in ponds of tributaries and submerged bushes on the shore, and sometimes they can be found in water environment with floating grass. After flowing into China, arowana has been successfully propagated in the south, and it is one of the main ornamental fish in China. Arowana is quite popular in Southeast Asia because of its feng shui demand.
attribute
Chinese name: arowana
Latin scientific name: Osteoglossumbicirrhosum
Nickname: double-bearded bone tongue fish
Field: animal kingdom
Phylum: Vertebrate phylum
Subphylum: Vertebrate subphylum
Department: Osteopharyngodontology.
Distribution: Amazon and Guyana
Length of adult fish: 90- 100 cm
physical features
1. Body shape: Arowana is in a long belt shape, and the silver belt is very slender. The lateral plane is flat, the tail is fan-shaped, and the dorsal fin and gluteal fin are strip-shaped and extend backward to the base of the tail stalk. The body height is about one fifth of the body length. The male fish between five and eight years old, about 90 cm, is much taller than the female fish.
2. Body length: The body length of arowana can reach 50 ~ 100 cm.
3. Side line: The side of the body is covered with five rows of large and beautiful round scales. The lateral line extends from the top of the posterior margin of the branchial lid behind the head to the caudal stalk. .
4. Mandibular: The lower jaw protrudes from the upper jaw and has a pair of short and thick beards.
5. Scales: Five rows of large scales are neatly arranged on its wide fish, shining silver in the light.
6. Color: The body color of the black dragon is silvery white with purplish blue, and all fins are blue black. The body color of silver dragon is silvery white, and the body color of young fish is blue; Both dorsal fin and anal fin have red and blue edges.
7. Mouth: The mouth is located at the top, and the oral fissure extends to the posterior edge of the orbit. There are several side-by-side linear lateral devices in front. There are a pair of tentacles on the snout. The tentacles of adult fish can grow to 3- 100px in wild individuals swimming in natural environment, while those of artificially raised individuals can only grow to 1-50px due to growth retardation.
8. Teeth: The teeth and bones of the mandible are very developed. The conical teeth arranged like a comb between the upper jaw and the lower jaw are very small and sharp, and the spacing between the teeth is very narrow. Not only the anterior maxilla, but also the sphenoid bone and hyoid bone attached to the dentate joint cover are very developed, which evolved to bite large crustaceans and beetles. The upper and lower jaws pay more attention to the hunting function of catching prey than the bite force of teeth.
9. Gill: The gill rake develops into a spine.
10. Eyes: Gollum's big eyes are close to the front edge of the palate, and his vision is very good.
1 1. Kiss: The kiss is very short. The nostrils are located in the front and upper parts of the eyes, very close to the nose and mouth.
12. Fins: Each fin reflects bright red or orange luster under light. Both dorsal fin and gluteal fin are very long, and the starting point of gluteal fin is more forward than dorsal fin. The first spine of the stretched ventral fin even exceeds the starting point of the gluteal fin. The pectoral fins are well developed. In particular, the long and powerful first thorn is a sharp weapon for the silver belt to jump out of the water. This wonderful flying power made the silver belt win the South American "jumping fish" (Amazon "water monkey"), which is easy to jump at night, so it added more protective nets. ) laudatory name.
Distribution area
Silver belts are widely distributed, from Guyana in South America and the Amazon River in Brazil to the downstream. From the downstream estuary to Peru (4000 kilometers upstream), Iquitos (even near Malan Yun He and Wu Kajari River), I have seen traces of silver belts. During the rainy season, the flood caused the water level of the tributaries of the Amazon River to skyrocket, and large fish swam back to nearby lakes and swamps to disperse. Although every kind of fish lives in its own environment, this kind of fish rarely appears in the mainstream of Amazon. Water pools in tributaries, submerged bushes on the shore, and even aquatic plants with floating grass are all habitats of the silver belt. This is not only a good environment for young fish to eat, but also an excellent place to avoid predators such as crocodiles and waterfowl diving into the water. It is weakly acidic soft water with a pH of 5.8-7.0, mixed with soft soil and a water temperature of 23-28 degrees.
Arowana is mainly produced in the Amazon river basin of Brazil. 1935 was introduced to the United States, and 1955 was introduced to Japan. From 65438 to 0966, Mr Miyata of Kobe, Japan, successfully propagated artificially with hot springs in a tropical farm in Asu Changyang, Kyushu. However, what we see in the China market is still imported from South America through re-export in the United States ...
Question 2: How do tropical fish raise Yinlong 1) Water quality is the most important thing to raise ornamental fish. Water quality mainly includes water hardness, pH value, dissolved oxygen and virus, which is the environment on which fish live and directly affects their growth. Fish farming generally uses drinking water, the hardness is about 5℃, which is suitable for the growth of tropical fish. After purification, there is basically no bacteria, but sometimes it contains a lot of free chlorine. So when you use tap water, you should bask in the sun for a day or two. The PH value of water is also an important factor in raising ornamental fish. According to the requirements of fish species, adjusting the PH value of fish can be reduced by filtering with filters and activated carbon, and improved by adding silica sand and medical stone.
(2) Water temperature and water temperature are particularly important for tropical fish, which is a kind of narrow-temperature fish. Too high or too low temperature will affect its survival and growth, so will goldfish and koi fish. To control the water temperature, you can adjust the temperature by lighting, heaters or a lot of water. Generally, the water temperature is around 22 ~ 25℃.
(3) Dissolved oxygen is directly related to the survival of fish. If the dissolved oxygen is too low, the fish will suffocate and die; If the dissolved oxygen is too high, fish will get sick easily. Generally, the best dissolved oxygen is 7 ~ 8 mg/L, and the lowest dissolved oxygen should not be less than 5 mg/L. Usually, fish are prone to hypoxia at dawn and 4 ~ 5 pm, so it is necessary to equip an air pump to increase oxygen in time. Changing water regularly and quantitatively can increase dissolved oxygen and improve the transparency of water.
(4) Illumination generally refers to sunlight and light. Proper light can promote the thyroid secretion function of fish, which is beneficial to the growth and development of fish, but excessive light is counterproductive. Light plays an important role in the transformation of water quality, which can change the color of fish, and ultraviolet rays in sunlight have a certain bactericidal effect. Installing 15 ~ 25 ultraviolet lamp in aquarium lacking sunlight for several hours every day is beneficial to the health of fish.
(5) Reasonable stocking density is an important measure to ensure fish health and water sanitation. High stocking density not only limits the activities of fish, but also easily causes hypoxia and water pollution. The stocking density should be based on the premise that dissolved oxygen in water is suitable for fish health.
(6) Bait Bait includes artificial bait and natural bait. The artificial bait is made by mixing protein, fat, vitamins and so on according to the nutritional needs of ornamental fish at various stages. Natural bait mainly refers to zooplankton such as rotifer, paramecium (water), cladocera (spider mite) and copepod (green), and benthos such as earthworm and red earthworm and some algae, which can be obtained by artificial culture or field collection. Be careful not to overdo it when feeding. 15 ~ 20min, spread evenly, regularly and quantitatively, and feed less in winter.
(7) There are many kinds of fish diseases, and different fish diseases must be diagnosed accurately and treated correctly by different treatment methods. The common treatment method is to dissolve drugs in water and treat fish with drugs. There are many reasons for fish diseases, mainly improper water quality and temperature, improper feeding, careless operation, introduction of pathogens and so on.
Question 3: what tropical fish is best for yinlong? I have kept a silver dragon 10 for many years. If I want to make the color in the jar more beautiful, I can keep a red parrot.
If you want them not to go to eat small fish, you can raise Jade-faced Guanyin.
But my domestic crocodile
If it's mixed, it's best to find a big one of similar size. For example, if your silver dragon is still a young seedling, you can buy a smaller one for a parrot or something. If your silver dragon is already very big, buy a bigger one to prevent it from being eaten ~
In fact, there is no need to sample too many fish. There are too many samples, and in-cylinder hygiene is a big problem. The more fish there are, the more bacteria there may be, and the water quality is difficult to guarantee ~
Question 4: Can arowana be mixed with small tropical fish? Suitable temperature is 22-25 degrees. I like weak acidic water and am not allowed to mix with small tropical fish. You can give Jackie Chan a tiger phoenix jar, which contains arowana and Feng Fei. The dragon is arowana, the tiger is tiger, and the phoenix is Feng Fei. Very auspicious! Preferably medium level.
Question 5: What tropical fish can arowana raise? Arowana is a large carnivorous fish, which can only be mixed with large fish, such as parrots and lucky fish. It is best not to mix with maps and arhats. They love to attack other fish and are suitable for single culture.
Question 6: What tropical fish can arowana raise? (Say a few more words) No, this is a single fish. If you want to raise more arowana, you can, but you must raise an odd number of arowana, which are about the same size. If you put any tropical fish in it, you will die.
Question 7: How does the tropical fish arowana maintain a strong body, grow rapidly and eat a lot? Fierce temperament, can swallow small fish, not mixed with other fish. Use a large fish tank with a cover and no bottom sand. I like weak acid or neutral soft water, the water temperature is above 22℃, and 24-28℃ is the most suitable. Mainly feed on animal bait. (Arowana is afraid of cold, pay attention to the water temperature)
Question 8: What does the small fish of tropical fish Yinlong look like? It is a shrinking silver dragon with some stripes on its tail.
Question 9: What's the difference between tropical fish, golden dragon and silver dragon? The price of arowana is much higher than that of Yinlong, and its origin is mostly called the living fossil of Malaysia. Yinlong can breed in China now, but Jinlong can't breed in China because of the weather and environment (so it's very expensive). At least 150.60.70 cans should be reserved. I also keep tropical fish, which is a kind of water tiger (rouge, huge yellow black spots), commonly known as piranha.
Question 10: Why does the tropical fish Yinlong only swim in the fish tank? Is it hypoxia?