A gentle slope gravitated to an uneven bottom whose depth was about fifteen fathoms. This bottom was completely different from the one I had visited during my first excursion under the waters of the Pacific Ocean. Here I saw no fine-grained sand, no underwater prairies, not one open-sea forest. I immediately recognized the wondrous region in which Captain Nemo did the honors that day. It was the coral realm. In the zoophyte branch, class Alcyonaria, one finds the order Gorgonaria, which contains three groups: sea fans, isidian polyps, and coral polyps. It’s in this last that precious coral belongs, an unusual substance that, at different times, has been classified in the mineral, vegetable, and animal kingdoms. Medicine to the ancients, jewelry to the moderns, it wasn’t decisively placed in the animal kingdom until 1694, by Peysonnel of Marseilles. A coral is a unit of tiny animals assembled over a polypary that’s brittle and stony in nature. These polyps have a unique generating mechanism that reproduces them via the budding process, and they have an individual existence while also participating in a communal life. Hence they embody a sort of natural socialism. I was familiar with the latest research on this bizarre zoophyte—which turns to stone while taking on a tree form, as some naturalists have very aptly observed—and nothing could have been more fascinating to me than to visit one of these petrified forests that nature has planted on the bottom of the sea. We turned on our Ruhmkorff devices and went along a coral shoal in the process of forming, which, given time, will someday close off this whole part of the Indian Ocean. Our path was bordered by hopelessly tangled bushes, formed from snarls of shrubs all covered with little star-shaped, white-streaked flowers. Only, contrary to plants on shore, these tree forms become attached to rocks on the seafloor by heading from top to bottom. Our lights produced a thousand delightful effects while playing over these brightly colored boughs. I fancied I saw these cylindrical, membrane-filled tubes trembling beneath the water’s undulations. I was tempted to gather their fresh petals, which were adorned with delicate tentacles, some newly in bloom, others barely opened, while nimble fish with fluttering fins brushed past them like flocks of birds. But if my hands came near the moving flowers of these sensitive, lively creatures, an alarm would instantly sound throughout the colony. The white petals retracted into their red sheaths, the flowers vanished before my eyes, and the bush changed into a chunk of stony nipples.