Is there a jellyfish that survives in Antarctica?

Yes, there are several species of jellyfish that survive in Antarctica, where water temperatures can reach below freezing. Some notable examples include:

Cryptocodakidae jellyfish: These are one of the most common types of jellyfish found in Antarctic waters. They are small, with a bell diameter of around 1 inch (2.5 cm), and have a bell-shaped body with four tentacles. They feed on plankton and small crustaceans.

Diplulmaris antarctica: This is a species of jellyfish that is endemic to Antarctic waters. It has a larger bell diameter of around 4 inches (10 cm), and has a unique shape with eight lobes around the bell margin. It feeds on various types of zooplankton.

Ptychogastria Antarctica: This is another species of jellyfish found in Antarctic waters. It has a bell diameter of around 3 inches (7.5 cm), and has a distinctive bell shape with a long, trailing proboscis. It feeds on small crustaceans and other zooplankton.

These jellyfish have adapted to the cold Antarctic waters through various physiological and biochemical mechanisms. They produce antifreeze proteins that prevent their body fluids from freezing, and they have a high tolerance for low temperatures. They also have a slower metabolic rate, which allows them to survive in environments with limited food resources.

Despite their cold adaptation, these jellyfish play an important role in the Antarctic ecosystem. They are a food source for various predators, including other jellyfish, seabirds, and fish. They also contribute to the recycling of nutrients in the ocean.