Monday July 16, 2018, Five Mantas @ Garden Eel Cove. On night dive I saw Koie Vicky Winona Eli and Ralph’s our snorkel guides swears he saw Bertha and other dive guide says he saw 6 at once. Any one else able to corroborate? 8 boats. JDL x 2. KHD KDC TT OE NC OET