A bell makes a beautiful sound when you ring it. The bluebird is a beautiful song bird. The blue jay is a beautiful, noisy blue bird. The blue shark is a sleek, fast-swimming shark with blue skin.
Some fish are blue.
A jacket is a short coat. This jacket is blue. A mailbox is where you leave letters to be mailed. The morpho butterfly is a bright blue buttterfly from rainforests in South and Central America. Some people wear pajamas to bed at night.