Eel-catfishes, eeltail catfishes, stinging catfishes or coral catfishes are members of the Plotosidae family. They are found in fresh, brackish, and marine waters of tropical and subtropical regions of the Indo-West Pacific. (Japan to Australia and Fiji). They differ from all other catfish families in possessing a dendritic organ at the base of the anal fin. Their second dorsal fin and anal fin confluent with caudal fin forming a pointed or bluntly-rounded tail. Their dorsal and pectoral fin spines are armed with potent venom, capable of producing very painful sting.
Eel-catfishes are bottom feeders and use the barbels around their mouth to detect food. They feed primarily on crustaceans, molluscs and fishes.
There are 10 genera and about 40 species of eel-catfishes that make up the Plotosidae family worldwide. Malaysia is represented by 2 genera and 3 species of eel catfishes.