Fish species are diverse groups of aquatic animals that live in various environments, from oceans to rivers and lakes. Each species has unique characteristics, such as size, color, and behavior. For example, the clownfish is known for its bright orange color and symbiotic relationship with anemones, while the great white shark is recognized for its size and predatory skills. There are over 30,000 different fish species worldwide, making them one of the most varied groups of animals. Some fish, like the salmon, are known for their incredible migration patterns, while others, like the goldfish, are popular pets. Understanding these species helps us appreciate the complexity of aquatic ecosystems.