For a charity auction, the winning bidder will get to swim with Panettiere and dolphins.
The auction is being held on eBay.com, and bids will be taken until September 4.
The goal of the event is to raise funds for awareness against commercial whaling in international waters.
The Heroes star has been defending dolphins and whales for many years. In 2007, she was arrested in Japan for joining a demonstration against the slaughter of marine mammals in the town of Taiji, though this hasn’t stop her from rallying for the cause.
The money collected from the auction will go to the Give Good Green campaign.