Your ears are prominently displayed on the sides of your head. But when you look at a fish, you can’t see its ears. That’s because a fish’s ears are located inside its head, right behind each eye. Each ear is a small, hollow space, lined ... READ MORE
Vertebrates are animals with a backbone and include mammals, birds and fishes.
Considering roughly three-quarters of the earth is covered in water, it should be no surprise that fish are the most numerous vertebrates in the world. According ... READ MORE