Age of fishes is also known as

• A. Permian era
• B. Silurian era
• C. Devonian era
• D. Ordovician era

The age of fishes is primarily referred to as the Devonian era. This period, which lasted from about 419 to 359 million years ago, is notable for the significant evolution and diversification of fish species.

Key Features of the Devonian Era

• Fish Diversity: The Devonian saw the emergence of many fish groups, including early sharks and bony fish.
• Marine Life: It was a time when oceans were rich with various marine organisms.
• Land Plants: The era also marked the rise of early land plants, contributing to the ecosystem's complexity.

Other Eras Mentioned

While the Permian, Silurian, and Ordovician eras are important in Earth's history, they are not specifically known as the age of fishes:

• Permian Era: Known for the rise of reptiles and the largest mass extinction event.
• Silurian Era: Featured the first vascular plants and early fish.
• Ordovician Era: Marked by a great diversity of marine life, but not specifically focused on fish.

In summary, the correct answer is C. Devonian era, as it is recognized as the age of fishes due to the remarkable developments in fish evolution during that time.