Sale! Select options Spotted Swamp Eel (Synbranchus marmoratus ‘spotted’) $74.99 $44.99 A unique South American eel species, the Spotted Swamp Eel is found in shallow waters throughout much of the Amazon basin. A slow moving and peaceful fish despite their large size, they are adapted to stagnant, oxygen poor water and can use atmospheric air by taking breaths directly from the water’s surface. In the aquarium they are easy to keep, but should be kept tightly covered at all times as they are notorious escape artists. The heavily spotted form is uncommon and more sought after than the olive or mottled form more commonly known as the Marbled Swamp Eel.