After reports of thousands of birds being affected by a chemical that was dumped in the sea, charities and school kids are campaigning to get the practice banned.
Twice now on the South West coast of England, seabirds, such as guillemots and puffins have washed up on beaches covered in a sticky substance. Almost two and a half thousand have died.
The substance is a chemical found in loads of things from chewing gum to tyres, and it's sometimes used in ships' engines.
It's known as PIB - polyisobutene - and animal welfare groups want it made illegal to dump it at sea. Some kids are joining in the fight too.