Characteristics
The Asian swamp eel has a scaleless, anguilliform body that grows to a meter or less, typically 25 to 40 cm as an adult. As a Synbranchidae, it has a tapering tail, blunt snout, and lacks pectoral and pelvic fins. The dorsal, anal, and caudal fins are rudimentary, with the caudal fin often absent. These fins serve to protect the swamp eel against rolling, and assist in sudden turns and stops (link). Its gill membranes are fused, but one v-shaped gill is located beneath the head. Such a shape prevents reverse flow (link). Its body and head are dark, with dark olive or brown dorsal coloring and light orange ventral coloring. This coloration camouflages the aquatic predator; however, some are brightly colored with yellow, black and gold spots(link). The bristle-like teeth of the M. albus, which are not easily seen, also indicate its carnivorous behavior (link).
Read more about this topic: Monopterus Albus