Scroll Algae, (Padina sanctae crucis) or Potato Algae is a brown macroalgae or seaweed, that is common in the shallows.
The algae is generally found among submerged rocks and mangrove roots, just below the low tide line. Because of its shallow nature, it requires strong lighting to survive. The algae is lightly calcified, but it still may be nipped by passing herbivores. The algae is beautifully ringed with white bands.
They look great bunched next to each other, or you can separate them and let them fill out. Scroll Algae will sometimes become frayed during the shipping process, this is nothing to worry about. Give it some time and the correct light, (strong to intense), and it will get strong again.