At the end of Jan 2020 I was fortunate enough to visit Myanmar on one of the last liveaboards before Covid shut down the borders and diving was halted. The 7 day trip aboard the Deep Andaman Queen was beautiful, with dives in Similan Islands & Surin Islands before crossing the border. Sadly it was most likely a La Niña year, with cold green water and limited visibility at most of the dive sites.
It did however bring about a lot of stingrays and most excitingly, multiple observations of the newly described Ranong Guitarfish (Rhinobatos ranongensis). We also had multiple Blotched Stingrays, Jenkins Whiprays, Bluespotted Stingrays & Eagle Rays. Sadly no sharks or big Mantas on this trip, so I guess we'll have to go again someday!