The reason for the empty shells of Pipi shrimps may be due to cooking for too long, because Pipi shrimps are deep-sea animals. Although the shells are hard, the meat is very soft and tender. After being cooked at high temperature, When steamed, the meat will slowly shrink. If steamed for too long, the meat will become smaller and smaller, and the taste will become worse and worse, resulting in an empty shell.

It is also possible that the shrimp itself is not plump. After being steamed at high temperature, the meat of the shrimp becomes smaller, so it tastes like there is little meat and the shell is empty.

There are also dead shrimps. After freezing and thawing, the moisture in the meat will flow out of the body with the ice water, resulting in the empty shells of the shrimps.