electric ray, Giant electric ray, Giant numbfish
Name: Narcine entemedor
Other names of the Giant
Cortez electric ray
Netečný rejnok obrovský
Raie électrique géante
Raya eléctrica gigante
in shape to the Lesser electric ray (Narcine
brasiliensis). Dorsum greyish tan to brown with several pairs of faint
ocelli often but not always present. Dorsal fins of equal size. Both dorsal fins
and caudal fin often darken considerably towards tips but have fine light
sandy areas sometimes near reefs.
where it is common, to
on sand during the day moving into shallow bays at night to feed.
Main diet consists of polychaete worms.
Gravid females produce uterine milk that supplements the yolk sac of the
observed this ray hopping forwards on its flexible ribbed pelvic fins.
Baja California, Mexico. Cabo Pulmo, Baja, Mexico.
lesser electric ray whilst not sharing a sympatric range is considered to be
possibly the same species.
to divers: May
be approached quite easily. If molested can shock but will more likely retreat.
Diving logistics: The
Cortez electric ray is common in shallow water in sandy bays from at least
central Baja southwards. It may be encountered whilst diving but is more likely
to be spotted whilst snorkeling over sand or rubble bottoms. The photographed
specimen was encountered in about 10 ft of water at dusk whilst snorkeling from
the beach at Mulege. Cortez stingrays were also present.
diving locations submitted by readers:
and further reading:
Sharks and Rays of the World. Scott W. Michael. Sea Challengers.
and Rays - Elasmobranch Guide of the World. Ralf M. Hennemann. IKAN.