Answer:
There are approximately 25,000 known species of fish in the world. However, the exact number can vary as new species are constantly being discovered and described.
Here is a breakdown of the estimated number of fish species:
1. Total number: Approximately 25,000 known species of fish.
2. Classification: Fish are classified into different groups based on their characteristics. Some of the main groups include:
- Jawless Fish: This group includes lampreys and hagfish.
- Cartilaginous Fish: This group includes sharks, rays, and skates.
- Bony Fish: This is the largest group of fish and includes the majority of fish species.
3. Diversity: Fish species can be found in various habitats, including freshwater, saltwater, and brackish water. They exhibit a wide range of sizes, shapes, colors, and behaviors.
4. New Discoveries: Scientists continue to discover new species of fish through exploration and research. These discoveries contribute to the ongoing understanding of fish diversity.
In conclusion, there are approximately 25,000 known species of fish. However, the number may change as new species are discovered and described.