Antarctic fish are unique species that inhabit the cold waters surrounding the continent of Antarctica. They have adapted to extreme conditions, with some species possessing antifreeze proteins that prevent their blood from freezing. These fish are primarily found in the Southern Ocean and include families such as Nototheniidae and Channichthyidae. Many Antarctic fish are characterized by their lack of scales and the presence of a gelatinous body, which helps them survive in icy environments. They play a crucial role in the marine ecosystem, serving as prey for larger animals like seals and penguins. Their adaptations make them a fascinating subject of study in evolutionary biology.