Minimum and Maximum Depths of Stony Coral Species in Caribbean and Indo-Pacific Waters
| Species | Minimum depth (meters) | Maximum depth (meters) |
|---|---|---|
| Acropora echinata | 8 | 25 |
| Danafungia scruposa | 1 | 27 |
| Astreopora expansa | 15 | |
| Scolymia lacera | 10 | 80 |
A marine biologist is researching four scleractinian coral species, which are also called stony corals because of the hard skeletons they develop. Consulting the table, she notes that the two species for which the maximum depths are most similar are __________