Heroes actress Hayden Panettiere has become the latest star to auction off a date - she'll take a fan whale watching in return for a hefty charity donation. The actress will spend a day with the winning bidder and guests on the high seas in August.

The whale watchers will be joined by marine expert and conservationist Jeff Pantukoff.

The eBay auction, which runs through May 30, will benefit The Whaleman Foundation, which is Panettiere's favorite charity.

Panettiere's deep love for sea life became clear last year when she risked her life by joining protestors in the waters off the coast of Taiji, Japan and attempted to stop fishermen from killing dolphins.

Since then, she has further championed the cause by lending her name to the Save The Whales Again! campaign and heading to Washington D.C. to confront the Japanese, Icelandic and Norwegian embassies about their hunting practices.

The auction is a Save The Whales Again! venture.

-Hayden Panettiere Pictures
-Hayden recently got into some hot water in Japan over her love of whales...
-...but she was honored for it

(This news article provided by World Entertainment News Network)