The fire eel (Mastacembelus erythrotaenia) is a relatively large species of spiny eel. This omnivorous freshwater fish is native to in Southeast Asia but also found in the aquarium trade. Although it has declined locally (especially in Thailand) because of this trade and overfishing for food, it remains common overall. The fire eel is not a true eel, but an extremely elongated fish with a distinctive pointed snout and underslung mouth. It is part of a group of fishes called spiny eels that also includes tire track and peacock eels. The group gets its common name from the many small dorsal spines that precede the dorsal fin. (Source: Wikipedia.org, CC BY-SA)