Fish are incredibly diverse, with over 30,000 different species known to science. They come in a wide variety of shapes, sizes, and colors.
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Fish are among the oldest vertebrates on Earth, with fossils dating back over 500 million years. They predate the dinosaurs.
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Most fish breathe through gills, extracting oxygen from water. Some, like lungfish, can also breathe air.
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Fish are ectothermic, meaning their body temperature is regulated by their environment. They are often referred to as "cold-blooded" animals.
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Fish inhabit a wide range of environments, including freshwater rivers and lakes, saltwater oceans, and even underground caves.
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Many species of fish undertake long-distance migrations. For example, salmon swim from the ocean to freshwater streams to spawn.
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Some fish species exhibit schooling behavior, where they swim together in coordinated groups. This provides protection from predators and enhances their hunting efficiency.
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Some fish, like the electric eel and electric catfish, can generate electric shocks for navigation, communication, and stunning prey.
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Fish communicate with each other using a variety of methods, including visual signals, body movements, and vocalizations (sounds).
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Fish are a crucial source of food for humans. They provide essential nutrients like protein and omega-3 fatty acids. Additionally, the fishing industry supports millions of jobs worldwide.
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