Mammals:
* Weddell Seal: These seals are named after the sea and are well-adapted to the cold waters, diving to great depths in search of food.
* Crabeater Seal: These seals are the most abundant marine mammal in the world and feed primarily on krill.
* Leopard Seal: Known for their aggressive nature, leopard seals are powerful predators and can attack penguins and other seals.
* Ross Seal: These seals are rarely seen and prefer the pack ice of the Weddell Sea.
* Southern Elephant Seal: These are the largest seals in the world and spend most of their time in the Weddell Sea during the breeding season.
* Orcas: Orcas, also known as killer whales, are apex predators and can be found in the Weddell Sea hunting seals, penguins, and fish.
* Minke Whale: These smaller baleen whales are common in the Weddell Sea and feed on krill and small fish.
Other:
* Emperor Penguin: These flightless birds are the largest penguin species and breed on the ice shelf of the Weddell Sea.
* Adélie Penguin: These penguins are smaller than Emperor penguins and breed on the coastline of the Weddell Sea.
Fish:
* Icefish: These fish have unique antifreeze proteins in their blood, allowing them to survive in the freezing waters of the Weddell Sea.
* Antarctic Toothfish: Also known as Chilean Sea Bass, these fish are deep-water predators and are a popular food source.
* Patagonian Toothfish: Another deep-water fish, these are also known as Chilean Sea Bass and can grow to large sizes.
These are just some of the larger swimming creatures found in the Weddell Sea. This harsh environment is a fascinating place to explore and study the adaptations of life in the polar regions.