Nurse sharks are particularly unassuming sharks, often seen lying motionless on the seabed, or under rocky overhangs. But when it comes to finding a mate, they really start to liven up.

He was a creative and a risk-taker — not exactly qualities that mesh well with anesthesiology, he said on last week's episode of ABC's "Shark ... nurse, he tells CNBC Make It. Keeping Legit Kits ...