Table S1.
Detection of S. thermophilum symbionts in the PAG, the Gulf of Oman, and the Red Sea through screening for the rDNA ITS2 S. thermo.-indel
| Water body | Region (abbreviation) | Reef | Number of samples | % hosts with S. thermo.-indel | Hosts >1%* S. thermo.-indel | Hosts <1%* S. thermo.-indel | Genera with S. thermo.-indel |
| PAG | Jana (JAN) | Subri | 31 | 29 | 6 | 3 | 5 of 13 |
| Subri (Jana) | 41 | 27 | 8 | 3 | 10 of 18 | ||
| Chandelier | 23 | 74 | 13 | 4 | 7 of 9 | ||
| Yassat (YAS) | Al Yassat | 33 | 100 | 33 | 0 | 7 of 7 | |
| Saadiyat (SAD) | Saadiyat | 42 | 98 | 40 | 1 | 11 of 12 | |
| Ras Ghanada | 26 | 96 | 22 | 3 | 7 of 7 | ||
| Gulf of Oman | Fujairah (FUJ) | Al Aqah | 34 | 15 | 1 | 4 | 4 of 14 |
| Dibba Rock | 37 | 0 | 0 | 0 | 0 of 14 | ||
| Muscat (MUS) | Bandar Khayran Islet | 90 | 0 | 0 | 0 | 0 of 21 | |
| Damanyat 3 sisters | 35 | 0 | 0 | 0 | 0 of 17 | ||
| Damanyat legends | 36 | 0 | 0 | 0 | 0 of 16 | ||
| Damanyat Noodle | 58 | 0 | 0 | 0 | 0 of 15 | ||
| Fahal Island Site I | 34 | 6 | 1 | 1 | 2 of 14 | ||
| Fahal Island Site II | 28 | 7 | 1 | 1 | 2 of 12 | ||
| Saifat Ash Shiekh | 87 | 1 | 1 | 0 | 1 of 23 | ||
| Red Sea | Eilat (EIL) | Eilat | 27 | 0 | 0 | 0 | 0 of 1 |
| Yanbu (YAN) | Yanbu 23 | 31 | 3 | 1 | 0 | 3 of 13 | |
| Yanbu Ayona | 36 | 0 | 0 | 0 | 0 of 17 | ||
| KAUST (KAU) | KAUST Al Fahal | 42 | 0 | 0 | 0 | 0 of 16 | |
| KAUST Inner Fsar | 31 | 3 | 1 | 0 | 2 of 13 | ||
| KAUST Shib Nazaar | 43 | 0 | 0 | 0 | 0 of 16 | ||
| Al Lith (LIT) | Al Lith Abu Lath | 40 | 15 | 3 | 3 | 7 of 17 | |
| Al Lith South Reef | 33 | 0 | 0 | 0 | 0 of 18 |
*
This is representative of total ITS2 amplicons detected (all clades).