Had the pleasure of diving at Koh Haa on a recent trip to Lanta and it was pretty amazing. I'm not one for caves but there were a couple that I ventured into and looking back out into the blue was incredible. There was a huge school of trevally and long nose emperor fish hunting in a swarm, it's hard to get an idea of scale because the water was so clear but they were about two or three foot long, watching them hunt in a pack was quite thrilling. The triggers and emperor butterflyfish were quite friendly too.
Big thanks to ‪@lantadiver1061‬ for such a great day especially Fabian for being such an excellent guide.