* Crabeater seals (Lobodon carcinophagus): These seals are the most numerous seal species in the world, with a population estimated at around 15 million individuals. They are found in the Southern Ocean around Antarctica and feed primarily on krill.
* Leopard seals (Hydrurga leptonyx): Leopard seals are large predators that feed on a variety of other seals, penguins, and fish. They are found in the Southern Ocean around Antarctica and have a population estimated at around 400,000 individuals.
* Weddell seals (Leptonychotes weddellii): Weddell seals are found in the Weddell Sea and have a population estimated at around 800,000 individuals. They are known for their ability to dive to great depths and hold their breath for extended periods of time.
* Fur seals (Arctocephalus spp.): There are several species of fur seals found in Antarctica, including Antarctic fur seals (Arctocephalus gazella) and South American fur seals (Arctocephalus australis). They have a population estimated at around 5 million individuals.
* Ross seals (Ommatophoca rossii): Ross seals are found in the Ross Sea and have a population estimated at around 200,000 individuals. They are known for their distinctive markings, which include a dark head and a pale body with dark spots.
In addition to these species, there are also smaller populations of other seal species found in Antarctica, such as elephant seals and southern elephant seals. The total population of seals in Antarctica fluctuates over time due to factors such as climate change, hunting, and natural predation.