Atlantic Torpedo

Atlantic Torpedo

Torpedo nobiliana

Size: to 6 ft long, 200 lbs., and 220 volts

Habitat: Soft sandy bottoms, from water's edge to 350 ft. Uncommon.

Notes:
Potentially dangerous

Distinguishing characteristics: Round body with a short tail and no stingers. This fish can produce enough electricity to stun a swimmer, but it is usually unaggressive. They are uncommon but deserve mention for the surprise they pack. I have seen unaware divers ( including a PADI "Underwater Naturalist" instructor ) get zapped in the tropics by the smaller ( 40 volts ) electric rays there.

Atlantic Torpedo

From way back when in 1996 ...

NJ Scuba
Diving Myths
by Dr. Jolie Bookspan, author of Diving Physiology in Plain English

Myth 1 - The Dive Reflex Protects You

diving myths

In the dive reflex, heart rate and limb blood flow decrease. Careful science ( that means we didn't accidentally step on the thermisters ) shows time and again that the dive reflex does not reduce the need for oxygen underwater as it does in marine mammals. Field studies ( where you're allowed to step on the thermisters ) indicate that the dive reflex does not extend breath-holding time. Occasional cases of human survival after very cold water near-drowning are not due to the dive reflex. Cold is the likely mechanism behind the reduced metabolism that permits survival.