Main Article Content
The amount of natural resources in Langsa is mangrove plant which is can be utilized for health especially in searching raw materials of medicines like an antimicrobial drug. Besides that, the availability of mangrove crab is also one of local potentials which are loved by local community. However, the people should take care in consuming mangrove crab because of its bacteria is very harmful as a damage both in short and long term. This study aimed to assess the potency of mangrove as an antimicrobial and to indicate bioactive components of mangrove in overcoming the disease in mangrove crab. Data were collected by taking Avicennia marina mangrove seeds in Kuala Langsa village. The samples were 1 kg of old and intact mangrove seeds. The phytochemical screening test showed that there were a few of bioactive compounds contained in mangrove seeds such as triterpenoid, tanin, phenol and alkaloid. Test of mangrove seeds as inhibitory was conducted by using agar diffusion method in methanol and n-hexane. Respectively, extract of that sample in methanol and n hexane obtained average clear zone of 3.13 mm and 3.03 mm over its positive zone. Furthermore, the clinical symptoms of mangrove crab after soaked by extract of mangrove seeds exhibit several changes like the decreasing of melanosis in carapace, the waning of swimming to be red and the color of carapace begins to be greenish.