Why do some animals change to giants in the midnight zone?

Some animals in the midnight zone, or the deep sea, exhibit gigantism due to a combination of factors such as extreme pressure, cold temperatures, and scarce food resources. These conditions can lead to slower metabolisms, allowing for longer lifespans and larger body sizes as a survival strategy. Additionally, larger bodies may help in efficient locomotion and increased storage of energy in an environment where food is limited. This phenomenon is known as deep-sea gigantism and is observed in various species, including certain types of squid and crustaceans.