I first traveled to Tonga in 2009 for research on my Masters. I worked with several tour operators, including Swimming with Gentle Giants (SWGG), to assess whale swimming in The Kingdom of Tonga.
Tonga is one of only a few places in the world you can swim with Humpback whales. And the regulations state clearly that only 4 people and a licensed guide can be in the water with the whales at any one time. We don’t scuba dive with the whales, only snorkel and practice a soft approach to interactions with these amazing mammals.