The "'shortlip electric ray "', " Narcine brevilabiata " is a species of electric ray in the numbfish family, Narcinidae.
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In the Mediterranean Sea, it remains the most common electric ray and in some areas may be increasing in number.
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The embryo's pectoral fins enlarge and fuse with the snout at a length of, giving it the typical circular electric ray shape.
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Various coastal demersal fisheries take the marbled electric ray as bycatch; captured rays are usually discarded as they have little commercial value.
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Nachmansohn obtained very active solutions of acetylcholinesterase from the electric organ of the marbled electric ray ( " Electrophorus electricus " ).
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Nocturnal and solitary, the marbled electric ray can often be found lying the sea floor buried except for its eyes and spiracles.
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Solitary and nocturnal, the Pacific electric ray can generate up to 45 volts of electricity for the purposes of subduing prey or self-defense.
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Synaptosomes can also be isolated from tissues other than brain such as spinal cord, retina, myenteric plexus or the electric ray electric organ.
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Though the Pacific electric ray will feed at any hour, it responds to prey much more quickly at night than during the day.
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Known parasites of the giant electric ray include the tapeworms " Acanthobothrium franus " and " artisanal ray fishery in the Gulf of California.
