THE PUFFER FISHES

In the puffer fishes or globe fishes (Tetrodon sp.), the body is naked, but there are generally small, movable spines in the skin. They are able to inflate themselves into the large abdominal sac, until the spines stand out erect. Most of these are marine and are found in tropical waters, but a few are confined to freshwater. All puffer fishes are more or less poisonous and are therefore never eaten.