* Fish: Think of salmon, tuna, or goldfish.
* Amphibians: Examples include frogs, toads, and salamanders.
* Reptiles: Snakes, lizards, turtles, and crocodiles are all reptiles.
* Birds: From robins to penguins to eagles, birds are all vertebrates.
* Mammals: Humans, dogs, cats, whales, and elephants are all mammals, and therefore vertebrates.
Let me know if you'd like more examples!