This one has a sequence of images: 1st image shows the big fish, 2nd image shows what I suppose is the brood of the big fish, the reamining 18 images show how the big fish was next to its brood, fleeing the moment I dived, leaving its brood behind, then the brood up close.
Please let me know if I mixed up 2 different species who just happened to be swimming next to each other...