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...
Super cool and hard to find macro. Not saying it should be taken without a license, but I'd consider it a valuable find. Would look great next to a crocea or maxima that also needs intense light!