Fishing sector. Drum for moray eel fishing. It is a traditional, artisanal fishing technique, cylindrical in shape, with an opening or funnel through which moray eels can easily enter, but not exit. Fish are placed inside and left on the seabed, usually near rocks or caves where moray eels usually live. Fishermen's Guild of San Roque and Isla Baja, Garachico, Tenerife, Canary Islands.