Friends who keep fish should all be familiar with the two types of fish, Genghis Khan fish (definitely introduced) and blue shark, but people often get them wrong. So how should we distinguish between the two? In fact, it is very simple. Below, the editor of Boqi.com will combine the experience of netizens to share with you the identification methods.
Genghis Khan's fish (certain introduction)
1 .Let’s take a look at the heads of Genghis Khan and Blue Shark
The upper jaw of Genghis Khan’s mouth is more distinct, and Genghis Khan’s head is wider when viewed from above. The head and snout of the blue shark is narrower than that of the sweat shark.
Blue shark
2. Take a look at the most Remarkable identification of fins
Genghis Khan's dorsal fin is high and straight, and the bone of the dorsal fin is very thick. The pectoral fins, pelvic fins, and dorsal fins have obvious drawings (floating fins). The fins of blue sharks are relatively small and not stringy.
3. Look at the tail again
Genghis Khan’s tail fin is generally not as obvious as black and white, and the blue shark’s tail fin is intricately connected. When Genghis Khan is surprised, his tail and body color will turn lighter. When the blue shark's tail is swimming slowly or when it is completely relaxed, it will droop its tail slightly, or swim around or in a local area. Genghis Khan did not droop his tail all the time.
4. There is also the feeding habit
Genghis Khan was very dangerous in catching food. The blue shark can only catch small fish that are very different in size from itself, but Genghis Khan, who can't hold it in his mouth, still wants to try it, and he is particularly fierce.
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