What is deep-sea gigantism?

While on land larger animals can be met in areas with cold climate, a similar trend is observed among see creatures depending on the depth.

The tendency of the sea creatures to be larger in deep-sea waters than representatives of the same species living in the shallow waters is defined as deep sea-gigantism.

The abnormal growth in the size of deep-sea animals can be explained by the principles of the Bergmann’s rule and the Kleiber’s law. In colder deep-sea waters animals tend to increase the body mass and metabolism efficiency.

One of the most common illustrations of deep-sea gigantism is the colossal squid ⬆️ that is believed to be able to weigh up to 700 kg (over 1,500 pounds) and grow to the length of 14 meters (45 feet). Other examples are Japanese spider crabs ⬆️ (that can grow to gigantic sizes of about twelve meters and weigh around 20 kilograms), giant isopods, sea slugs, sponges, worms, sea spiders.

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