Swamp and Spiny Eels: Synbranchiformes

Some swamp and spiny eels can breathe air with special structures in the throat. They usually are active only at night. In some species of swamp eels, adult males grow a head hump and are larger than females. These fishes lay about forty eggs at a time. The eggs have a pair of long threads for attaching themselves to the bottom material. Reproduction takes place during the wet season. Females probably spawn, or release eggs, more than once but only in one season. These fishes do not have a long life span.