Zebra sharks sometimes cross oceanic waters to reach isolated seamounts. Volcaniclastic sedimentary rocks dominate shallow-water seamounts. Most modern New Caledonian terranes formed via accretion of oceanic island arcs and seamounts. Terrain&colon; two (atolls) on dormant volcanic seamounts. Continental fragments include some seamounts and underwater plateaus. Many seamounts also have hydrothermal vent communities, for example Suiyo and Loihi seamounts. Other deep sea demersal fish can also be found around seamounts and islands. They mostly forage near mainland coastlines, the continental shelf, and seamounts. The mapping revealed the existence of four rocky outcrops thought to be former seamounts. During the Permian atolls developed near the Equator on the mid-Panthalassic seamounts. All four islands along with the many seamounts on the ridge are post-abandonment alkaline volcanoes. They are also known to congregate around rocky islets and seamounts. Frontal erosion is most active in the wake of seamounts being subducted beneath the forearc. Lastly, pinnacles are small pillar-like seamounts. In Southern Australia, 90 percent of the surfaces on coral seamounts are now bare rock.