Here is an absolutely crazy idea: Why don’t we save the corals by stopping pollution and fossil fuel usage?

Yes!

I always recommend checking out the following organizations, which are active in many nations:

https://a22network.org/ the a22 network is a overarching network of many national climate movements using civil disobedience.

https://fridaysforfuture.org/ Fridays for future was created after Greta Thunbergs peaceful protests and now has many national networks using mostly peaceful demonstrations.

https://scientistrebellion.org/ scientist rebellion is a worldwide network of scientists using civil disobedience. Again there are many national groups within.

https://feddit.de/post/9186385