Oceana is one of our favorite environmental organizations because of the great work they do for our favorite place…the ocean. Its primary goal is to protect and restore the world’s oceans on a global scale. Oceana was founded back in 2001 and has since become the largest international advocacy organization focused solely on ocean conservation. There’s no shortage of support for the group when it comes to celebrities who want to use their influence to help protect the ocean and spread Oceana’s global message. Many celebrities have teamed up with Oceana and starred in PSAs. Here are some of those PSAs featuring celebrities ranging from Kate Walsh to Adrian Grenier.