Fish also love massage

Life under the sea is also very pressure. The tailfish are lucky to have ' massage ' staff to help them relieve nervous stress.

Spiny tailed fish often utilize cleaning fish to help them clean up parasites and dead skin cells. In addition, cleaning fish also provides another service: relieve stress for the agitated tailfish by rubbing and rubbing against the tailfish skin.

Scientist Marta Soares and colleagues at the University of ISPA (Portugal) tested on two groups of fish, each consisting of 8 children. Each fish is in a bucket for a short time to simulate the pressure they encounter in nature, such as being chased by enemies, conflicting with other fish, or competing for food.

Then they released the dendritic fish into the cleaning fish. A group of fish was left in a quiet state, while the other group was shaken.

The team found that the fish in the barrel were swaying to the bottom of the barrel and using fake fins to rub their backs. This group of fish is more relaxed, measured by the amount of steroid hormones - secreted when the body is stressed.