What characteristics to pay attention to in Arowana appreciation

Is it to be identified or to be viewed?

The culture of Arowana originated from Arowana, which means long tongue in Spanish. In Japan it is called silver saury or silver boat fish, in Hong Kong it is called dragon tuzhu, in Taiwan it is called dragon belt, and in mainland China it is called dragon fish. Arowana is an ancient fish with a long history, which can be called a living fossil of ornamental fish, which existed as far back as 3.5 million years ago.

Later, with the movement of the earth's crust and the migration of the continental shelf, Arowana gradually distributed to all parts of the world, and is now mainly distributed in Asia, South America and Australia. One of the most famous is the Asian Arowana from Southeast Asia, which is the only species of endangered species of wild flora and fauna under the International Treaty on Endangered Species known as the Washington Convention, and is therefore the only Arowana protected by Zheng Fanzhi.

The hail fish produced in Southeast Asia include the red dragon, the orange red dragon, the ** dragon, the platinum dragon, the green dragon, and the golden dragon. The golden dragon, red dragon and green dragon were discovered in 1844, and the Asian arowana is native to the lakes of Malaysia, Indonesia, Myanmar, Vietnam, Cambodia and other places. Juvenile red dragon fish are slightly different from adult fish, juvenile scales are small, white and reddish, but adult fish are different, the edge of the abalone cover has a deep red color, the tongue of the fish also appears red, and the scales are shining; **The edge of the dragon scales is shiny and shiny**; The scales of the platinum dragon are white-gold; The scales of the green dragon are blue, some of them are the most precious with purple patches, the body size is shorter than that of other species of arowana, the lateral line is particularly exposed, the scales and scales are thicker, and can be reproduced by artificial reproduction.

The Arowana in South America includes the silver dragon and the black dragon. The silver dragon was discovered in 1829 by fish researcher Dr. Wendley in the Amazon basin of South America, and its origin is in the Amazon basin, the Maranyun River, the Ukayali River and other places in South America. The silver dragon has huge scales in the shape of a pink semicircle, and the body color of the fish is cobalt blue, blue, and cyan, and it is shiny.

The black dragon was discovered in 1966 and is native to the Rio Negrò and Blanche rivers in South America.

The size of the black dragon is similar to that of the silver dragon, and the adults are slightly silvery, but when they are larger, they tend to be black with purple and cyan and golden bands. These two species of arowana are popular all over the world because of their abundance of wild resources, the ease of reproduction, and the fact that they are not restricted by the Washington Convention.

In general, ichthyosaurs were between 2 and 4 meters (although some species were smaller, and some species were longer than 4 meters). It has a dolphin-like head and a long, toothed snout. The ichthyosaur had a long, pointed mouth, tapered teeth in the upper and lower jaws, and the entire skull looked like a triangle.

Like today's tuna, its body shape is suitable for fast swimming, the vertebral body is like a saucer, the sides are slightly concave, a vertebrae are like a string of saucers strung on a rope, and the tail vertebrae are narrow and flattened. Some ichthyosaurs appear to be suitable for deep diving, with a pair of large, round eyes on either side of their heads, which can be up to 30 centimeters in diameter, while the largest known eye in living vertebrates is the blue whale's eye, which is only 15 centimeters in diameter. As a result, ichthyosaurs can hunt down prey such as squid and fish at night or in the deep sea.

Some scientists estimate that ichthyosaurs could dive as far as 500 meters into the ocean (Ryosuke Mootani, 2000). It is estimated that ichthyosaurs could swim at speeds of up to 40 kilometers per hour. Like today's cetaceans, they breathed air and had a fetus (some adult ichthyosaur fossils contained fetuses).

Although ichthyosaurs are reptiles and their ancestors laid eggs, it is not surprising that ichthyosaurs themselves are pregnant. All air-breathing marine animals either go to the shore to lay eggs (such as turtles and some sea snakes) or have to lay their calves directly in the water (such as dolphins and whales). Due to the streamlined size of ichthyosaurs, it is quite unlikely that they will be able to climb ashore to lay eggs.

According to Ryosuke Mootani's estimates, a meter-long pterodactyl weighed between 163 and 168 kilograms, while a 4-meter-long big-eyed ichthyosaur (ophthalmosaurus icenicus) weighed between 930 and 950 kilograms. Although ichthyosaurs look like fish, they are not fish.

Stephen Jay Gould says ichthyosaurs are his favorite example of convergent evolution. Here the similar structure is similar, but of different origins. He noted

The convergence between the fish and the fish was so strong that they evolved in the same place, and the dorsal and caudal fins that evolved in the same place had the same hydrodynamic design. Since these structures have never evolved, they are particularly significant. Terrestrial reptile ancestors did not have plates on their backs and no pieces on their tails to serve as precursors to them. ”

Come to the diagram of the diagram.

3/6/2010 17:57 Reply.

Unconcealed arrogance.

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3rd Floor Foreword: Luohan is a kind of artificial ornamental fish born in recent years, which has been cultivated through the hybridization, mutation and solidification characteristics of a variety of American cichlids. In essence, Luohan are hybrids, there is no purebred at all, but due to nearly 20 years of artificial breeding and market operation, some relatively stable varieties have been produced, but to say that these varieties are stable is not to say how stable their heritity is, but more to say that the number of these varieties in the market will be relatively stable.

So, on the other hand, the cultivar of an arhat is a collection of characteristics.

In nature, the birth of a species takes at least tens of thousands of years, and it is formed after mutation, adaptation to the environment and the stability of N generations, and it is less than 20 years since the birth of the Luohan, and almost no variety has experienced a long-term stable process, so it is impossible for today's Luohan to have a genetically stable variety, and the name of the Luohan is essentially a label for a commodity. From today's Arhats, although there are many varieties, they cannot cover all Arhats, and it can be said that many of the current Arhats are "black households without ID cards", which cannot be named exactly. In addition, many breeders name it indiscriminately, and often a variety will have different names, so the Luohan market is very chaotic, and there are many Luohan who are not worthy of the name and are shoddy.

Before introducing the varieties of Luohan, I would like to introduce to you the strains of Luohan, which are different from varieties, and the strains are like the surnames of Luohan, although the names are different, but there are only three "surnames" of Luohan, namely: pearl, golden flower, and horse horse.

Three strains. 1. Pearl series, pearl is the more stable of the three strains, and its characteristics are also more obvious.

Typical pearls exhibit these characteristics: a. an upturned head with frontal spots; b. Protruding eyes, red circles; c. The mouth shape will have different degrees of lower pockets; d. The dorsal fin and anal fin are longer drawn, and the dorsal and anal fin of mature male pearl arhats can exceed the body 1 3;e. The tail fin is round or spear-shaped, and has different degrees of collapse or wrinkle tendency, and the angle formed by the rear three fins is large (large gap); f. The body is inverted triangle (wide in front and narrow in the back), and there are irregular ink spots on the body;

In addition to the above characteristics, pearl Arhat is generally more colorful, but because Pearl Arhat has been improved for more than 10 years, many different varieties have been cultivated, such as red fortune, blue diamonds, yellow pearls, shiny string pearls, etc., although these fish are different in color, but the version is basically similar, so the most critical factor to identify pearls is the version!

3/6/2010 17:59 Reply.

Unconcealed arrogance.

173 followers.

Arowana generally refers to the beautiful arapaima, because of its large and flat body, the trunk is covered with large, neatly arranged shining scales; The mouth is large, there are two tentacles at the corners of the lips, and the demeanor is leisurely when swimming, like the mythical "dragon", so it is named "Arowana". It still retains the body shape characteristics of ancient times, and is known as the "living fossil of fish", which is of great breeding and ornamental value. An ancient population of freshwater fish with whiskered jaws, flattened sides and ribbed abdomen.

1. Arowana generally refers to the beautiful arapaima, because of its large and flat body, and its trunk is covered with huge and neatly arranged shining scales; The mouth is large, there are two tentacles at the corners of the lips, and the demeanor is leisurely when swimming, like the mythical "dragon", so it is named "Arowana". It still retains the body shape characteristics of ancient times, and is known as the "living fossil of fish", which is of great breeding and ornamental value. An ancient population of freshwater fish with whiskered jaws, flattened sides and ribbed abdomen.

2. When the juvenile fish is characterized by a blue and green background with a light red band with a golden thin frame, the scale frame of the light meridian will transform into golden yellow after growth, and the scale bar of the golden yellow blue or green bottom will reach the fifth row of scales, over the entire dark green back, which is different from the red angry gold in addition to the scales, that is, the difference between the angry part and the anal fin, and the upper part of the back and tail fin should show dark blue. Covered in gold, it is a five-layer scale, similar to gold bars, which is very popular with Chinese businessmen, mainly for its auspiciousness. In addition, there are several variants of Arowana in different colors:

"Red Arowana", "Green Arowana", "Yellowtail Arowana", etc.

Arowana is a kind of high-end ornamental fish that everyone likes, and the majority of aquarists are attracted by its appearance and bright color, so do you know how to appreciate it? We will briefly introduce to you the appreciation of arowana!

The appreciation of arowana is mainly divided into the following aspects: body size, scales, whiskers, fins, eyes.

Body type

The body size should be proportioned, not too wide or too narrow, not too fat or too thin; The ratio of head to back length should be moderate, and the slope of the intersection of head and back should not be too large; The back of the fish should not be hunched. The standard body shape in the structure should have a streamlined aesthetic; When swimming, keep your head and body level, and don't dive or tilt.

Scales

The scales of the beautiful Arowana should not be uneven or uneven, and after being illuminated by the light, the pieces should reflect the bright color they should have: the scales should not have black spots. Another point is to look at the color of the scales of the Arowana, the color of an Arowana is an important factor in determining the ornamental value of the Arowana.

The color of the scales is divided into the color of the scale frame and the color of the bottom of the scale, and the color of the scale frame and the color of the bottom of the scale will be significantly different from the color of the scale. However, there is also a distinction between the scale frame of the Arowana scales and the hair color of the bottom of the scales, which we call eating the frame!

Scales recover after they fall

The length of recovery time after scaling varies depending on the age of the fish, but in general, it can be restored to its original appearance.

It should be noted that when the Arowana recovers to grow scales, it will have an itchy feeling, and the Arowana will often want to rub its body, causing the scales to deform. The way to avoid it is: remove rough things in the aquarium, such as rockeries, coarse shell sand, etc.

Beards

A beautiful beard should be long and straight, not long or abnormal, and the color of the beard should be the same as the color of the fish's body, which is the standard of beard beauty.

Fins

The pectoral fin is large and curved

The fins of each part are open and flat, with a graceful curvature, and have considerable proportions with the body of the fish. The caudal fin should be large and open, not wavy; The pectoral fin should be large and long, and the curvature should be graceful, so as to express the beauty of the fish, and the color of the caudal fin needs to be distinguished according to the different species.

Eyes

The eyes should be symmetrical, bright and shapely

Since arowana is active in the upper layers of water in its natural environment and seeks out creatures on the surface of the water for food, it will look upwards from time to time. However, when kept in the aquarium, it will be in the space of light transmission on all sides, and because the environment changes, it is easy to forage, and it is no longer necessary to look up to find food from time to time, so it is easy to cause the situation of clear eyes and downward vision, and the owner does not have to worry, which is a natural phenomenon of aquarium feeding.

First, the scales of the Arowana, generally speaking, the brighter the scales, the more beautiful the Arowana. Second, the fins of the Arowana, the longer the fins, the better the quality of the Arowana.

First of all, it is necessary to look at the scales, the surface can not be uneven, and secondly, after being irradiated by light, the scales will reflect the luster, and whether the color of the scale frame and the bottom of the scale is clearly distinguished.

Arowana is a large freshwater fish. It has existed as early as the ancient Carboniferous. The discovery of the fish began in 1829 in the South American Amazon, when it was named by the American ichthyologist Dr. Temperate Zonal (Vandell).

In 1933, the French ichthyologist Dr. Beru Chau-lan discovered the red arowana in Saigon, Vietnam. In 1966, French ichthologists Bran and Dobaton discovered another species of arowana in Phnom Penh. Later, experts and scholars from some countries have found some other species of Arowana in Vietnam, Peninsular Malaysia, Sumatra, Banga Island, Bharboran and Thailand in Indonesia, so they divided Arowana into Golden Arowana, Orange Red Arowana, ** Arowana, Platinum Arowana, Blue Arowana and Silver Arowana.

The actual introduction of aquariums as an ornamental fish began in the United States in the late 50s, and it was not until the 80s that it gradually became popular around the world. Arowana (7 photos in total**).

Arowana (7 photos in total**).