When Bertie Gregory went diving near Roca Partida, he wasn't planning to encounter a giant oceanic manta ray called Chocolate ...

#national geographic  #nat geo  #natgeo  #animals  #wildlife  #science  #explore  #discover  #survival  #nature  #culture  #documentary  #photography  #ancient civilization  #history  #mystery  #bertie gregory  #filmmaking  #underwater filmmaking  #animal documentary  #behind the scenes  #manta ray  #wildlife documentary  #scuba diving