Shark

Some people wonder if sharks are tetrapods or not. Let’s look at it more closely at what tetrapods are to figure this out.   Are Sharks tetrapods? Sharks are not tetrapods. Sharks belong to the class of Chondrichthyes. Tetrapods are four-limbed animals that make up the superclass Tetrapoda. This includes extinct amphibians, reptiles, and mammals. …

Sharks and dolphins are both sleek predators that live in the ocean. Depending on the species, sharks and dolphins are roughly the same size and weight. However, there are major differences in their skeletons. Shark skeletons are not made of bone. The shapes of the skull, teeth, and spines differ between sharks and dolphins.   …