That's one of the reasons why I pushed so hard to have my dad cremated. All my pets have been cremated (their ashes are on my "pet cemetery shelf") and I want to be cremated too. Me and all the pets who have gone before are going to get turned into an artificial reef.
I was browsing cnn.com earlier and on the front page they had a link to an article about green burials. I clicked on it, thinking to read about cardboard coffins and parklike cemeteries, but instead it was mostly about the reefs. And biodegradable coffins.
Even if you aren't anywhere near dying, consider doing a non-traditional burial. Maybe by the time you do die, the non-traditional will be traditional. We can only hope.

(Picture source: Eternal Reefs)
(screenprint of original article)
12.19.16.9.15 13 Xul 7 Men