Deep-sea jellyfish are fascinating marine creatures that inhabit the dark depths of the ocean, often found at depths of over 1,000 meters. They have a gelatinous body, typically shaped like an umbrella, and long, trailing tentacles that can capture prey. These jellyfish are bioluminescent, meaning they can produce light, which helps them attract food and communicate with other jellyfish. Unlike their shallow-water relatives, deep-sea jellyfish have adapted to extreme pressure and cold temperatures. They primarily feed on small fish, plankton, and other tiny marine organisms. Some species, such as the Giant Jellyfish, can grow to impressive sizes, showcasing the diversity of life in the deep ocean.