Fish are a group of cold-blooded aquatic vertebrates that belong to the superclass Pisces. They are characterized by several distinctive features, including:
- A streamlined body shape for swimming
- Scales for protection and streamlined movement
- Gills for breathing underwater
- Fins for stabilization, propulsion, and maneuverability
Fish come in a wide variety of shapes, sizes, and colors and are found in nearly every type of aquatic environment, from the deep sea to freshwater streams and lakes. Some common examples of fish include:
- Salmon
- Tuna
- Trout
- Catfish
- Goldfish
- Piranha
- Angelfish
Fish play a critical role in the world's oceans and freshwater ecosystems, serving as both predators and prey and supporting food webs that sustain other aquatic and terrestrial species. They also have important economic and cultural significance, as many are harvested for food and recreation.
