The only catfish found in coral reefs. Juveniles form dense ball-shaped schools of about 100 fish and are found over reefs and seagrass beds; adults are solitary or occur in smaller groups of around 20 and are known to hide under ledges during the day (Ref. 5503 and 1602). Searches and stirs the sand incessantly for crustaceans, molluscs, worms and sometimes fish (Ref. 5213). The highly venemous serrate spine of the first dorsal and each of the pectoral fins are dangerous, and even fatal in rare cases (Ref. 1602).