Lobsters (龙虾) can be found throughout the world's oceans, with the exception of the north and south polar regions. Different types of lobster choose different areas to live. Many lobsters live in shallow water in the coastal areas around islands. One group of lobsters, called deep­sea lobsters, lives in the cold, deep sea.

When it comes to predators (捕食者), humans have to be placed first on the list thanks to a multibillion dollar fishing industry. In the oceans lobsters face threats from a range of fish and sea mammals.

Atlantic cod are found throughout the Atlantic Ocean at depths of between 200 and 440 feet. Small cod are primarily bottom feeders. Fully­grown cod will eat pretty much anything they can swallow whole including lobsters.

Summer Flounder

The summer flounder is a flat fish. What is unique about the fish is that both its eyes are on one side of its body. They stay close to the sea beds in the Atlantic waters off the coast of North America. They are effective predators that search for food on the sea floor. The flounder has sharp teeth capable of crushing (粉碎) small lobsters.

Harbor Seals

Found in Arctic and sub­arctic waters in both the Pacific and Atlantic oceans, the harbor seals rest on sandy beaches and take to the water to hunt. Seals have a varied diet, eating a range of fish. They also eat lobsters.

Wolffish

The wolffish is found in coastal waters on both sides of the North Atlantic. It has a large mouth with sharp and long teeth. These teeth are specifically for eating hard­shelled animals. Lobsters are easy prey for the fish.

5. The first paragraph is mainly about ________.

A. the types of lobster

B. the habitats of lobsters

C. the features of lobsters

D. the living habits of lobsters

6. What is unusual about the summer flounder?

A. It is large and round.