feeding

About a week ago, I mentioned my new Hawaiian sun coral and the fact that I was training it to open diurnally rather than at night. In the wild, sun corals lead a mostly nocturnal existence, in part because of the tides and in part because it’s safer to extend their tendriled polyps when the fish are mostly sleeping. A friend asked how I go about training corals, so I thought I’d share that process here today. Sun corals eat by opening their mouths to catch and absorb plankton and other tiny dissolved particles from the water and by extending