Since 2015, 12 representative sites of the Mahoran reefs have been equipped on the sub-surface with probes measuring the temperature every 10 minutes (every 1 hour since mid-2021). The data from these probes are collected every 2 months by the Operations Department of the Parc marin de Mayotte. The aim is to better understand seasonal variations and bleaching phenomena. A computer program developed by the PNMM makes it possible to analyse these data. Regularly, new probes are purchased (NKE) and calibration tests are carried out. Depth: - Baie de Boueni: 3,67 - Double barrière: 4,15 - Grand Récif Nord Est: 3,04 - Longoni: 5,02 - Passe bateaux sud: 3,25 - Passe en S - bouée 3: 4,39 - Passe en S - externe: 4,15 - Saziley: 4,43 - Surprise: 2,98 - Tanaraki: 2,92 - Hajangoua: 4,55   Cood : - Baie de Boueni: -12.9117722; 45.1349777 (-12°54.726'S; 45°08.099'E) - Double barrière: -13.00181667; 45.11048333 (-13°00.109'S; 45°06.629'E) - Grand Récif Nord Est: -12.74848333; 45.27966667 (-12°44.909'S; 45°16.780'E) - Hajangoua: -12.8383888; 45.2401333 (-12°49.033'S; 45°13.873'E) - Longoni: -12.71003; 45.16542 (-12°42.602'S; 45°09.925'E) - Passe bateaux sud: -12.9815555; 44.9880833 (-12°58.881'S; 44°59.296'E) - Passe en S - bouée 3: -12.86556667; 45.27113333  (-12°51.934'S; 45°16.268'E) - Passe en S - externe: -12.87976667; 45.27708333  (-12°52.780'S; 45°16.625'E) - Saziley: -12.98563333; 45.18245 (-12°59.138'S; 45°10.947'E) - Surprise: -12.64603333; 45.13325 (-12°38.762'S; 45°07.995'E) - Tanaraki: -12.76168333; 45.06656667 (-12°45.701'S; 45°03.994'E)