CNN CNN Newsroom Live December 6, 2021 06:54:00
>> i don't see any mantas. >> i see them in the shallows. >> they are in the shallows. you can see them on the surface already, so they're already feeding which is great for us. >> reporter: as soon as the team spots their subjects, it's time for a closer look. >> manta rays are really majestic creatures. they're known as gentle giants. they have no teeth, no sting, nothing to hurt humans. >> reporter: these reef manta rays which feed on particle plankton reach 40 meters in width and weigh up to 700 kilos. today they are considered a vulnerable species mainly due to habitat degradation. >> i'v...