Ten sites were surveyed there: Umm El-Hagar (submerged reef), Umm El-Raak (submerged reef), Bagel (submerged reef), Al-Hayla, Al-Shabeen, Umm Al-Madah, Gadeefa (underwater island), Al-Hacece, Al-Sharaa and Abou Atteque. Sea cucumber population assessment methods Estimation of sea ...