Sand dollars have five teeth inside them. When broken open, the teeth fall out and are shaped like doves, giving them a legendary meaning.Know More
Sand dollars are flattened, burrowing sea urchins related to sea cucumbers and starfish. The sand dollar's exoskeleton, or test, is made up of calcium carbonate plates arranged in a circular pattern and is covered with a velvety mat and spines with tiny hairs called cilia. These cilia help the animal to move or burrow into the sand and to ferry food into its mouth, located on the underside. Inside the mouth, the sand dollar has a set of five teeth, which produces the rattling sound when the test is shaken.
The Legend of the Sand Dollar is an Easter and Christmas favorite. This story tells of five doves that are inside the sand dollar that, when broken open, spread goodwill and peace.Learn More
Although some artificially produced sands may have small enough grains to appear homogeneous, beach sands are heterogeneous mixtures, according to Elmhurst College. Heterogeneous mixtures are composed of particles which vary in size, shape or phase.Full Answer >
The common porpoise, also known as the harbor porpoise, lives throughout the temperate coastal waters of the Northern Hemisphere. The porpoise prefers shallower waters and is most common in bays and harbors.Full Answer >
Dolphins are very smart and playful animals. Although they live in the water, dolphins are mammals just like humans and need air to breathe, which they do out of a blowhole on the top of their heads. In fact, dolphins can only stay underwater for 15 minutes at a time.Full Answer >
Lobster buoys are colorful floats that are attached to lobster traps. Traps are submerged, so the buoys mark their location above water and allow lobster fishers to retrieve them easily.Full Answer >