#海鱼和淡水鱼有什么区别 #
I don't know why so many people on the Internet are so confident that they dare to give a few criteria and say, "So you can tell the difference between marine fish and freshwater fish." Probably "the ignorant are fearless".
It is very responsible to say that the only difference between marine fish and freshwater fish is that one is in the sea and one is in freshwater. Even this method is not allowed, because there are still those soda fish in semi-salty water. What does soda fish mean, you can Baidu yourself.
Here are a few common claims on the Internet.
1, marine fish do not have scales, freshwater fish have scales
This TM is the most common thing I hear. You find that there is no, and there is a law: people who say this tend to live in inland areas.
These people can see more than 10 kinds of marine fish, in addition to the belt fish, yellow croaker probably do not know other marine fish, so they dare to talk so boldly. As everyone knows, the seaside people laughed out loud when they heard it.
Let's say that the most common small yellow croaker (yellow croaker) and large yellow croaker are marine fish, right? Do they have no scales? They are all scaly and visible to the naked eye.
Large yellow croaker
The real seabream, commonly known as the Gargie fish, which is often used to make crab meat sticks, is it a seawater fish, is there a scale? Yes, and it's big.
True snapper
Sharks are also saltwater fish, do they have scales? Of course, there are, and they are not ordinary fish scales, but "dermal fine teeth", that is, fish scales like teeth.
Judean weasel shark
And then there are the freshwater fish. Do catfish have scales? No. Do yellow eels have scales? No. Do Chinese eels have scales? No. Say good freshwater fish don't have scales? This kind of punching the face example can be kept on, saying that it can be done for a day and a night.
2. There are fewer spines in marine fish and more spines in freshwater fish
Another standard for punching the face faster than the speed of light. The only reason for saying this is that the man himself has little knowledge, knows only a few fish, and thinks that the whole world is like this.
Marine fish give the impression of less spines, and most of our common and commonly eaten marine fish are several suborders under the order Perciformes, which generally have fewer spines. For example, sea bass, flounder, striped fish, true seabream, grouper, mackerel and so on.
Juvenile sail lizard fish, a marine fish
Marine fish also have many spines, such as dumplings. This kind of fish is very common, the environment is a little better by the sea, when you go to the sea to bathe, you can encounter a group of small blue-gray fish swimming on the surface of the sea, which may be a dumpling.
There are so many thorns in the bread that you doubt life, so many that there is not a single piece of meat without thorns. However, the seaside people also have a way to deal with it, and the specific method is not to say, sell a pass.
Dumplings
There are also common spring fish that go out to eat barbecue, also known as woolly scale fish, courgette fish, and there are many thorns, but its spines are relatively soft, and everyone chews it.
capelin
And then there are the freshwater fish. Freshwater fish give people the impression of more spines, is the general carp we eat carp, crucian carp, grass carp bighead carp four big fish, is the carp family below several subfamilies, these subfamily fish many have intermuscular spines, so feel more thorny.
The intermuscular spine is this kind of Y-shaped small spine, have you eaten it when you eat river fish?
The schematic diagram of the intermuscular spine goes something like this:
However, outside of these subfamily, freshwater fish do not necessarily have more spines. For example, the tilapia imported from abroad belongs to a kind of cichlid, which is basically a large thorn + rib, and there is no intermuscular thorn.
Tilapia
Mandarin fish of the order Perch, catfish of the order Catfish, yellow jaw fish, various bass, bass, catfish, catfish, as well as loach, yellow eel, etc., not only have fewer thorns but also taste.
Long-snout, commonly known as river dumplings, is a must for grilled fish
So, those who are not ashamed to easily distinguish between marine fish and freshwater fish, is it reliable?