We had a few questions about great whites for Mark too. Listen to our audio interview with him and hear his expert answers on shark personality, intelligence and other little-known shark qualities.

Read Mark's responses to your email questions.

Shark Personality
Sharks do have their own personalities, and they even show emotion.

RealPlayer | Windows Media

Shark Intelligence
Research is beginning to show that sharks aren't just killing machines. They are highly social and very intelligent.

RealPlayer | Windows Media

Shark Behavior
There are over 600 species of sharks, so of course different species display different behaviors. Environment plays a role, too.

RealPlayer | Windows Media

Emotional Attachment to Sharks
Mark has gotten to know lots of sharks personally, named them and developed a special fondness for them.

RealPlayer | Windows Media

Attracting a Shark
It takes lots of patience to attract a shark.

RealPlayer | Windows Media

Shark Moments
Mark has had a couple of close calls with great whites, but he says it was his misunderstanding, not theirs.

RealPlayer | Windows Media

Myth of the Great White
Even before Jaws great whites were legendary, but the reality is great whites aren't malicious.

RealPlayer | Windows Media

Great White Conservation
The actual number of great whites in existence is unknown, but their special place as an apex predator and slow offspring production make them worth protecting.

RealPlayer | Windows Media