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

Scotch boiler ( cutaway )
A typical Scotch boiler ( cutaway )

Boilers are one of the most common shipwreck features, found on almost all engine-powered vessels. The purpose of a boiler is to produce high-pressure steam for the engine to propel the vessel. Steam boilers have been in use from the early 1800s to the present day.