So we have been fairly thorough in our discussion about coral reefs, which of course are prominent, oceanic features made of hard limestone skeletons produced by tiny coral animals.

The Woods Hole study found that many Marine animals like mollusks and corals that build hard shells and skeletons are most at risk from this.

In the same way beavers construct DAMS, red grouper excavate and maintain distinct holes whose rocky surfaces provide a place for coral, sponges and other Marine life to congregate.