When you buy the blue hanging theme tank and put it in the tank for the first day, it is recommended to give it an isolation box without live rock. Let it eat, drink, and sleep in it for about 3-5 days. When it gets used to the owner's feeding, it will rush up to eat when the food is thrown away, and then put it in the main tank.
The key point is that in the first few days of living in the main tank, you should pay attention to where the blue hanging is sleeping after turning off the lights. If it is between the filter and the tank wall , or next to the wave-making water intake, or in the cracks of small and unstable live rocks, please take it out when it is sleeping and put it back in the isolation box for a few days. In this way, the blue hanging will become smarter as it closes. It won't be like this again after a few days when you put it in the main tank.