Koh Kudi is a small island in the Koh Samed-Kao Laem Ya National Marine Park which provides excellent diving opportunities. The sea floor comprises solid rock which gently slopes into deeper water (going down to a maximum depth of 20 metres). The site offers splendid marine life which includes batfish, reef fish, black coral and seafan. Underwater visibility is maintained at around 12 metres on most occasions. The site is suitable for beginners.