I am a mammal. Males are called bulls and females are called cows. The sound I make is called a song or click. I can be blue, gray, or white and black. I am very large. Who am I?

I do not have gills, scales or fins. When I lose an arm, I can grow it back. I like to hang out face down in the sand. People call me beautiful! Who am I?

I am a reptile. I am cold-blooded. Most kinds of me migrate. I have a shell. Who am I?

I am a fish. I do not have a stomach so my food passes through my body quickly. Males give birth to their young. Who am I?

I lay eggs. I have gills. I am covered in scales. Who am I?

I do not have a skeleton so I can squeeze through tight places. My mouth is at the center of my arms. I have 8 legs. Who am I?

I am not a strong swimmer. I do not have a brain. I sting my prey. Who am I?

There are over 400 different kinds of me. I have very powerful jaws. I may grow and use over 20,000 teeth in my lifetime. Who am I?

I am an invertebrate, which means I do not have a back bone. I am usually red, and have find like a fish. I have an ink sac that releases a black substance. Who am I?

I eat algae, mollusks, and worms. I have claws. I come in different sizes. Who am I?