Just a week in april to try out the Omani waters. Stayed in Muscat with the Extra Divers - I would not recommend that diving center. Not a good management, nor staff - but I met a fellow Swede, Patrik and his nice wife Katja - and they are really great! Did daily boat trips. Visibility not that good (probably a bit early in the season) but a few really nice and for me new nudibranchs!!