Definition: The term "ichthyobatrachian" refers to a group of marine animals that are characterized by their large brains and fins, as well as their ability to swim at great speeds. These animals are typically found in bodies of water such as oceans, seas, and rivers, and they play important roles in the food chain and ecosystem. Some examples of ichthyobatrachian animals include fish, sharks, rays, and octopuses, among others.