Use a sustainable seafood guide, including those from WWF, to ensure any seafood you eat - such as tuna - is sustainably sourced. Avoid shark fin soup, and other shark and ray products unless it is clear they are from sustainable sources. Be aware that shark meat is often sold under other names, such as "rock salmon" in the UK, and "flake" in Australia.
WWF Seafood Guide Pages
Avoid buying shark teeth, and other shark curios unless they are fossils. While sharks are not typically caught just for their teeth, buying them may support unsustainable fisheries.
If you fish recreationally, consider safely release for any sharks and rays you catch, and assisting in tagging programmes if you catch them regularly. Local fishing associations and marine research laboratories are likely to know if shark tagging is occurring in your area.
Take videos/pictures of any unusual or rare sharks and rays you see underwater or in fish markets, especially sawfishes, and share them with local experts or WWF. You might even be lucky enough to record a new species to science.
Also, we are always looking for amazing video and pictures that we can use to motivate more people to care about sharks and rays. Do contact us if you have some to share, particularly those taken underwater.