She might have played the fearless Betty Draper Francis on the long-running drama Mad Men, but in real life January Jones admits to having her fears. The Hollywood actress opened up about why she doesn't take too many risks in the ocean along with why her 4-year-old son Xander loves Sharks.

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According to Xpose on Wednesday, the blonde beauty opened up about being claustrophobic during a charity event for Oceana, the largest international ocean conservation and advocacy organization, in Beverly Hills. Jones is a huge supporter of their cause.

She said, "I'm not a daredevil. I like jet skiing. I don't love to scuba dive. I just get a little claustrophobic. When I do trips with Oceana, I usually free dive and hold my breath. [I can't hold my breath] for too long. It would be like a minute, tops.''

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The single celebrity mother also said that her son Xander is a little more courageous than she is and that he wants to one day go swimming with sharks.

Jones explained, "We read a lot of books about sharks and dinosaurs. He wants to go swimming with sharks with me, but I've told him he has to wait until he's 10. It's a fair age, I think. But he can go on tagging trips on the boat maybe.''

The proud mom also said that her son is passionate about dinosaurs.

"He knows all the names of every dinosaur, and he wants to be a real dinosaur scientist when he grows up. Not a paleontologist, but a scientist for real dinosaurs. So, he's dreaming big," she explained.

Tags: January Jones