Deep sea creatures are organisms that live in the ocean's depths, typically below 1,000 meters (3,280 feet). These environments are characterized by extreme pressure, low temperatures, and complete darkness. Many deep sea creatures have unique adaptations, such as bioluminescence, which allows them to produce light, and specialized body structures to withstand high pressure. Examples of deep sea creatures include the anglerfish, known for its glowing lure, and the giant squid, which can grow up to 43 feet long. Other fascinating species include the deep-sea jellyfish and the vampire squid, both of which have evolved to thrive in their dark, cold habitats.