Seagrass ecosystems are important because seagrasses are the manufacturer, because the plants can photosynthesize as well as the aquatic nursery and refuge. The study of sea grass samples collected samples from all seven villages, Rock Garden, 5 hours west of the village used to extract DNA samples two ways CTAP by means of Joseph Doyle Joseph Doyle and techniques Sequence-. related Amplified Polymorphism (SRAP) to assist in the monitoring of seagrass Kuicheai needle by genetic samples of seagrass then extract DNA for genetic variance.