Hi ChiroCraig! Yes, anyone who is passionate about scuba diving or the ocean is likely involved in some sort of conservation activities. There are plenty of great organizations out there.

Personally, I like http://Reef.org but here's an article that highlights some of the larger organizations: https://www.underseas.com/blog/best-marine-conservation-organizations-donate-earth-day/

One of the biggest things you can do is to stop wearing poisonous sunscreens. Research appears to be pointing toward sunscreens as a major cause of coral bleaching worldwide.

Here's a link to a sunscreen that is actually safe for use in and around the water. For the record, I am not compensated in any way by them, but I have met the owner and have several dive buddies who also know them to be serious, legit scientists with a great product: https://Stream2Sea.com