Learn about different body designs in fishes
Learn about the external anatomy of fishes
Learn about the internal anatomy of fishes
Learn about different types of fish scales
Learn about different types of fins



Explore this timeline to follow the evolution of fishes
Ancient jawless fishes
The earliest jawed fishes
Jawed kings of the Devonian
The cartilaginous fishes
The lobe-finned fishes
The ray-finned fishes