特征多变的黑龙鱼

黑龙鱼黑龙鱼是一种原产于南美洲热带的淡水鱼。它的学名是二硝基骨舌菌。它的长度不超过60厘米（2英尺），是一种优良的鱼类。它的肉很好吃。大规模；背鳍和臀鳍呈线形，几乎与尾鳍相连；嘴角高于眼睛，两条长触手向前延伸。雌鱼将卵含在嘴里，直到幼鱼孵化。大多数进口的黑龙是大约7厘米的幼鱼。黑鱼身上厚厚的黄色线条格外引人注目。此外，从吻端穿过眼睛的黑线和鳃盖后面的黄色衣领图案也是黑龙外观的焦点。当黑龙的体长超过10厘米时，身上的黑色会褪色，并逐渐变成略带灰色；黄线也会褪色，背鳍、臀鳍和尾鳍的边缘会呈现橙色。然后当体长超过30厘米时，每个鳞片上都会出现深蓝色和红橙色条纹，酝酿出非常细腻的美感，呈现出与亚洲龙鱼完全不同的独特氛围。每个人都喜欢不同的颜色，而黑龙多变的特点可以说是它在粉丝中受欢迎的主要关键。内格罗河及其支流的一部分是黑龙的主要栖息地。与银龙相比，黑龙的分布面积非常小。从日本进口的黑龙都在当地狩猎。狩猎季节开始于1月左右，结束于5月左右。在进口季节开始时，个体仍然悬挂着大的卵黄囊。与银隆相比，黑龙对交通和水质变化的适应能力较弱，因此在进口时也会有很多损失。然而，由于可以以比过去更便宜的价格买到黑龙，自动售货店要么没有给予足够的照顾，要么清点库存，要么让黑龙很容易磨损。尽管每年都有大量的黑龙被进口，但寻找大型黑龙繁殖个体比寻找纯红龙更为困难。巴西政府提出的保护政策显示出限制出口的倾向。同时，与其他龙鱼不同，黑龙的养殖技术不是很清楚，因此我们希望大家能够重新认识黑龙的美丽和价值，并仔细喂养它

Black arowana with changeable characteristics

Black arowana Black arowana is a freshwater fish native to tropical South America. Its scientific name is Osteoglossum bicitrosum. It is not more than 60 cm (2 feet) long and is an excellent fishing species. Its meat is delicious. Large scale; The dorsal fin and gluteal fin are linear and almost connected with the tail fin; The corners of the mouth are raised above the eyes, and the two long tentacles extend forward. The female holds the eggs in her mouth until the young fish hatch. Most of the imported black dragons are about 7cm young fish. The thick yellow lines on the body of the black fish are particularly eye-catching. In addition, the black lines passing through the eyes from the snout end and the yellow collar pattern behind the gill cover are also the focus of the appearance of the black dragon. When the body length of the black dragon exceeds 10cm, the black on the body will fade and gradually change into a slightly gray color; The yellow lines will also fade, and the edges of dorsal fins, hip fins and tail fins will appear orange. Then when the body length is more than 30 cm, dark blue and red orange stripes will appear on each scale, brewing a very delicate aesthetic feeling, and presenting a unique atmosphere completely different from that of Asian arowana. Everyone likes different colors, and the changeable characteristics of Black Dragon can be said to be the main key to its popularity among fans. A part of the Negro River and its tributaries is the main habitat of the black dragon. Compared with the silver dragon, the distribution area of the black dragon is very small. The black dragons imported from Japan are all hunted locally. The hunting season starts around January and ends around May. At the beginning of the import season, individuals still hang large yolk sac. Compared with Yinlong, Heilong has a weak adaptability to transportation and water quality changes, so it will also have a lot of losses when importing. However, because the black dragon can be bought at a cheaper price than in the past, the vending shop either does not give adequate care or takes inventory or allows the black dragon to easily wear out. Although a large number of black dragons are imported every year, it is more difficult to find large black dragon breeding individuals than to find pure red dragons. The protection policy proposed by the Brazilian government shows a tendency to restrict exports. At the same time, unlike other arowana, the breeding technology of black dragon is not very clear, so we hope that you can re-recognize the beauty and value of black dragon and carefully feed it