Although eels naturally thrived in freshwater, this specie inhabits marine waters and commonly sighted in Philippines. My sightings were usually juveniles in group wiggling as they swim in accord, incessantly stirring the sand. This specie feed on crustaceans, mollusks, worms and small fish. They appear to be harmless as they always shy away within close range, but all specie of eelfish are confirmed to be venomous! Beware then when you encounter them next time you dive.