Sunday 12-31-23, Eighteen Mantas at Garden Eel Cove. I saw Akari, Koie, ReNata, Emma, Chloe, Mighty Q, Quernie, Quarantina, Vicky, Auntie, Jolene, Leon, Blain, Tim, Jordan, Nick, Vinny and Koen. Plankton at deep circle was weak at first but got very thick by end of the scuba. About 30 boats.