Kayaking on Koh Rong offers crystal-clear waters, exploring beaches like Long Set and Sok San, paddling through lush mangrove forests at Prek Tasok, and experiencing magical night paddles to see bioluminescent plankton. Rentals are readily available from beachfront spots, costing around $5/hour or $10-15/day for beach kayaks, with options for sunset, moonlit, or mangrove tours for different pricing.