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This Weeks Question:

How many one pound lobsters does it take to get one pound of meat?

Last weeks Question:

Last Weeks Answers:           

Electroreception.  It's ability to detect electric potential is so acute that it can detect potential prey by the voltage in another critter's heart.

Electroreception is a shark's sixth sense.
 
The sense to detect it's surrounding from afar which is more superior than human sense? This is what I was told during a shark dive in the Bahamas.

Shark's sixth sense is the ability to sense electromagnetic pulses. These are perceived thru small pores called ampullae of Lorenzini. Connected to these pores are long, jelly-filled bulbs that lead to nerves below the skin and on to the brain.

In addition to the five senses that humans possess, sharks also receive sensory input through electroreception, the ability to sense weak electric fields. Sharks not only sense these fields, they rely on them to locate prey and, perhaps, navigate through the ocean.
Sharks have the greatest sensitivity to electric fields of any known marine animal. This specialized system of gel-filled pores, called the ampullae of Lorenzini, allows sharks to detect the small electrical signals that all animals, including human beings, emit. This sense works best at close range and enables sharks to pinpoint an animal they may not even see in dark water. Sharks also use this sense to position their head and mouth when moving in for final attack.
Sharks are unable to distinguish between natural signals and those produced by artificial objects such as metal and wire. This may explain why sharks sometimes attack boats, docks and steel cages.
The shark's "sixth" sense, along with other specialized senses, makes it among the most efficient predators on Earth. Sharks have one of the keenest senses of smell of any animal. They can scent from great distances, and their sensitivity to smell seems to increase the longer they have been without food. In fact, scent detection comprises almost 70 percent of a shark's brain activity.
https://www.ncaquariums.com/ask-the-aquarium/what-is-considered-to-be-a-sharks-sixth-sense 

The answer is that sharks have the ability to detect electrical signals put out by other fish
and/or animals.

In addition to the five senses that humans possess, sharks also receive sensory input through electroreception, the ability to sense weak electric fields. Sharks not only sense these fields, they rely on them to locate prey and, perhaps, navigate through the ocean

Rick D'Amico
Bruce W. Beattie
mikeaponte
Mike Kreul
Paul Gacek
Janice Mastriano
VTF in GSO 

Note: To avoid duplications and any resulting misunderstandings as to the winner each week----trivia answers should only be sent to Debby at dive@DiscoveryDiving.com