Tetraodontidae is a family of estuarine and marine fish from the order Tetraodontiformes .. The morphology , similar fish that are included in this family are similar to porcupine fish that have large areas of the spine ( vertebrae Tetraodontidae unlike the thinner , hidden , and can be seen when the fish is puffing up ) . The scientific name refers to the four large teeth attached to the upper and lower jaws are used to crush shells of crustaceans and mollusks , their natural prey .
Puffer fish are generally believed to be the second most poisonous vertebrate in the world after the Golden Poison Frog . Internal organs such as the liver and sometimes their skin are highly toxic to some animals if eaten , but some species of fish meat is used as food in Japan ( called河豚, pronounced fugu ) , Korea ( called bok ) , and China ( called河豚he2 tun2 ) and prepared by chefs who know which body part is safe to eat and how many levels .
Tetraodontidae consists of at least 121 species of puffer fish are divided into 20 genera.Ikan this are manifold in tropical waters and waters not common in the temperate zone and not in the cool waters . They have a small to medium size , although some species have a length of more than 100 centimeters ( 39 in )
