Penelitian ini bertujuan untuk mengetahui kondisi sosial ekonomi masyarakat pesisir di Kelurahan Hajoran Induk Kabupaten Tapanuli Tengah Provinsi Sumatera Utara. Penelitian ini merupakan penelitian deskriptif berdasarkan metode survei. Sampel diambil dengan metode proporsional area random sampling. Data dianalisis secara kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa tingkat pendidikan nelayan tergolong rendah yaitu tamat SD/sederajat, status kepemilikan rumah sendiri dengan jenis papan dengan jumlah anggota keluarga 4 - 6 orang. Tingkat kesejahteraan keluarga yang rendah disebabkan oleh tingkat pendapatan yang rendah dari anggota keluarga. Dengan demikian masyarakat pesisir di Kelurahan Hajoran Induk tergolong miskin dengan tingkat pendapatan yang tergolong rendah.

Lake Pandan is one of the lakes located in Tapanuli Tengah district. Morphometry can explain the biological and chemical processes of the lake, regulate nutrient load, productivity and the influence of input loads from the surrounding area. Therefore, the morphometry of lake was needed as a basis for lake utilization and management. This is what underlies the morphometric research of Lake Pandan, where there has been no research on this topic. The purpose of this study was to determine the morphometry of Lake Pandan. This research was conducted on April 2019. The results of measurements of lake surface dimensions obtained that Lake Pandan has an area of ± 103 Ha with a maximum length of 2,034.60 m, a maximum width of 1,033.38 m, and a length of around the lake of 5,395 m. With an edge (Sl) of 5.395 m so that the Lake Development Index (LDI) was obtained at 0.302. The LDI value of 0.302 illustrates that the lake has an irregular shape. LDI can be used to describe the level of productivity of water if the value is greater, the waters are more fertile. The subsurface dimension found that the average depth (Z) of Lake Pandan was 0.21 m with maximum depth (Zmax) 1.7 m. The morphometric parameters of lake influence the physical, chemical and biological processes in the waters of Lake Pandan, such as depth. Based on depth, Lake Pandan has low stability and easy to experience stirring.

Indonesia is a maritime country that has many marine natural resources. Central Tapanuli Regency has a position close to the sea. Even though fish has a high protein content with amino acids, students or young people still like to eat fish a little. So it is necessary to provide information and at the same time invite the younger generation to like to eat fish to increase their intelligence. This community service activity was carried out at MTS Al-Maidar Pandan, Pandan District, Central Tapanuli Regency. The method of implementing this service activity is done by providing socialization about the importance of eating fish for MTS Al Maidar students. The outcomes achieved are increasing students' knowledge about the benefits of fish consumption and the nutritional value contained in fish as well as providing students' understanding with the knowledge to be able to distinguish between fish that are suitable for daily consumption or not.