A good place to see mobula rays ( the smaller version of the manta's) are the Azores (Portugese islands). In summer the diving is good en water temperature around 22-23 °C. There are several islands where you can find schools of Mobula (up to 40 ). If you are lucky you may have encounter with a whale shark , manta or even a whale. Also nice schools of baracuda or trevally. all surroundings are vulcanic and offer great UW vieuws. I visited Santa Maria but Pico and Faial offer the same stuff
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