Sea cucumbers feed on small creatures at the bottom of the sea. When there are many creatures on the sea floor, they eat and drink. However, the creatures on the seabed are very sensitive to the changes of seawater temperature. When the sea surface heats up, they will float up, and when it cools at night, they will return to the bottom of the sea. After summer, the temperature of the upper seawater is relatively high due to the strong sunshine. Small animals at the bottom of the sea float to the surface for annual reproduction. At this time, the sea cucumber left at the bottom of the sea can't climb, run or eat. The way to deal with hunger is to sleep.

Sea cucumber (Sea Cucumber) is an echinoderm sea cucumber, which lives at the seaside of 8000 meters, usually at the bottom of the sea where the water temperature is quite low. It usually feeds on filtering impurities in sand, and is also called "scavenger in the ocean".