Fish can fart. Some fish have evolved the ability to breathe through their intestines and get oxygen from the air because they live in a low dissolved oxygen environment. Oxygen pressure into the digestive tract, where gas exchange, and waste gas will be expelled from its mouth or anus, so that you can fart. In addition, if fish are diseased due to intestinal flora, they will also produce some gas discharge.
1. Fish that can emit light: Fish generally emit light for two reasons. The first reason is that they are parasitized by luminous bacteria. For example, hairtail and harpodon in the southeast coastal areas of China will emit light after being parasitized. The second is that fish have their own luminous organs, such as candlehead fish, which have luminous organs on its abdomen and side, and there is also a kind of bald fish in the deep sea, whose head is flat and covered by large luminous organs, which replace the role of vision.
2. Fish that can generate electricity: In fact, fish that can generate electricity are not rare. There are about 500 known species. The common ones are electric eel, electric catfish, electric eel, and electric ray. The current and voltage emitted by these fish are different. In the electric eel, for example, the cells in its body act like laminated batteries, generating high-voltage electricity when nerve signals are stimulated.
3. Fish that can make sounds: Few people can hear the calls of fish. Different fish often have different organs for making sounds. The purpose of making sounds is mostly for courtship. Among them, the gills of gurnard sound like pigs, the sound of box fish like dogs, the sound of electric catfish like cats, and the sound of seahorses like drums.
