HOW TO: Watch What You Eat on World Oceans Day [PICS]

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After signing the pledge, users are encouraged to submit pictures of their efforts on Instagram using the tag #oceans. You can find some of the pictures below. One of the most interesting twists involves eating sustainable seafood. When users make that pledge, they are directed to a page that encourages them to photograph seafood meals at restaurants that serve sustainable products and upload them to Oceana's Foodspotting page. That page will then become a resource for people to know what is both delicious to eat and good for the planet.

"It's kind of a cool idea, especially if it takes off and people contribute," said Michael Gardner, Oceana's communications fellow. "Once this gets moving, we should have a nice collection of restaurants across the country to enjoy and those to stay away from." The page already has guides for cities such as New York, Los Angeles and San Francisco.

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The campaign is part of a larger Ocean Heroes contest Oceana launched in March. Two winners — one adult and one junior — were picked from 500 nominees. Peter Wallerstein won as the program director at the Marine Animal Rescue in El Segundo, California, where he helps save injured marine mammals. The junior award went to 8-year-old Sophi Bromenshenkel who sold cookies and drinks, and sent out fliers and emails to raise more than $3,500 for a marine conservation program at the University of Miami.

Take a look at some of the images from the Oceana community and let us know what you make of the pledges. Do you think they'll make a difference? Sound off in the comments.