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Jawless Fish: The Ancient Survivors of the Ocean

Jawless fish, also known as agnathans , represent one of the oldest and most primitive groups of vertebrates on Earth. Dating back over 500 million years, these fascinating creatures have survived various mass extinctions and environmental changes, offering scientists a glimpse into the early stages of vertebrate evolution. Despite their primitive nature, jawless fish have unique biological features that set them apart from jawed vertebrates. This article explores the fascinating characteristics