Training … On the Sun

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

Read more