This 19 August 2019 video from Indonesia says about itself:
Diver Swims With Giant Mola Mola Fish
These lucky divers were dwarfed as they swam next to a Mola mola fish that was bigger than them.
Fred Tan Chee Wei Lael was swimming in Crystal Bay, Bali, when he came across the colossal sunfish.
Having almost come to the end of their dive, veteran diver of 20 years Fred was stunned when he saw the two-and-a-half-metre long giant floating nearby.
Despite only having 10 minutes of air left, he decided to swim alongside it for two minutes before having to head back to the surface.
Also, smaller fish swim around the sunfish.