Fish rely on three things to balance their bodies, namely otoliths, swim bladders and fins. Otoliths grow in the inner ear, which is an important organ in vertebrates to maintain body balance. The swim bladder is found in most bony fish, and lesions can cause the fish to roll over. The fin is responsible for maintaining balance when swimming, no matter which one is lost, it will be caught in the swing.
1, pectoral fins: pectoral fins for fish, in addition to maintaining balance, but also when swimming as a paddle to provide power, but this swimming speed is not fast. When the tail is used as a power to move forward, the pectoral fins can also play a braking and decelerating effect.
2. Pelvic fins: Pelvic fins are very special for fish, because different fish have different pelvic fins. Some grow on the abdomen, some in front of the pectoral fins, and some between the two gills. Growing in different parts also means that it has different functions.
3. Dorsal fin: Dorsal fin mainly assists body movement, but there are also some fish, dorsal fin can be used to provide power, such as hairtail, conger eel, seahorse, etc., all need to use dorsal fin to swim.
4. Anal fin: The anal fin plays a similar role to the dorsal fin. Generally, there is only one anal fin. In addition to maintaining body balance, it can also coordinate swimming.
5. Caudal fin: The caudal fin is the most important part of a fish. It can provide power. A fish without a caudal fin cannot turn.
