Table 2.

Coral skeletons are space-filling

Sample	Morphology	Surface area (m2/g)
Aragonite single crystal	Pseudohexagonal prism	0.72
Blastomussa merleti	Massive	1.01
Montipora turgescens	Encrusting	0.68
Micromussa lordhowensis	Massive	2.61
Stylophora pistillata	Branching	3.53
Al2O3 nanoparticles from McHale et al. (49)	Aggregate	100–300

Specific surface area of selected coral skeletons measured by BET. The error is 10% on all measurements.