Puffer, also called pufferfish or blowfish, is a type of fish that can inflate its body like a balloon. Puffers normally measure from 2 inches (5 centimeters) to nearly 2 feet (61 centimeters) in length. These fish can expand their stomachs and take on the shape of a ball by rapidly swallowing water or air. Puffers frequently inflate their bodies to protect themselves from their enemies.
There are about 120 kinds of puffers. They have greatly modified scales, and many have smooth, leathery skin. Some puffers have prickles on their underside that appear only when the fish inflates its body. Certain small puffers have a long, narrow snout. All puffers have strong upper and lower teeth that form a beak. Puffers use their teeth to tear coral or crush the shells of various sea animals. Puffers eat shellfish, such as clams, crabs, and shrimp.
Most puffers live in warm oceans. A few varieties are found in rivers and other fresh water. Some puffers can be eaten, but most are poisonous. In Japan, puffer is called fugu and considered a rare and tasty dish. Some puffers do well in home aquariums.
