Sea creatures that live in the depths of the ocean can sometimes grow much bigger than similar creatures that prefer shallow waters.
This is a phenomenon called deep-sea gigantism.
A well-known example of deep-sea gigantism is the colossal squid, which can grow up to 14 metres long.
There are several theories about the causes of deep-sea gigantism.
It is believed that the colder temperatures at the bottom of the ocean can slow an animal’s metabolism.
This is important for the survival of deep-sea creatures.
Food can be hard to find in the cold, dark water, which means that these creatures have to conserve their energy.
With such slow metabolisms, they take a long time to mature.
This allows them to continue growing.