Our hotel host informed us that swimming on the north side of this beach in May is not safe due to stingrays. However, there is an interesting sight of sea cows feeding on seaweed near the pier from 8-10am in the morning. The south side of the beach offers a peaceful swimming experience with gentle waves and sandy shores, but only during high tide, usually between 8am and 1pm. Unfortunately, the water appeared milky and foamy, and there was a significant amount of floating rubbish, which made it look and feel unclean despite its blue color. It was disheartening to see that the island's sudden popularity, following the neighboring Koh Kradan being voted the number one beach destination in the world, has resulted in pollution and dirtiness near the piers on Koh Mook's seas, due to the thousands of tourists passing through on boats, exceeding the island's capacity to handle.