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This study aims to examine Muslim fishermen's strategies in increasing their income and the constraints they face in Miang Island Village. The research was conducted through a qualitative approach with descriptive method, relying on primary and secondary data obtained through observation, interview, and documentation. The results showed that the fishermen developed various strategies such as selling their catches to collectors, processing fish into high-value products such as shredded fish, and opening fishing guide services. They also utilize local knowledge about potential fishing locations to increase their catch. These strategies help reduce dependence on a single source of income. However, there are several constraints faced, such as bad weather that disrupts fishing activities, limited access to wider markets, lack of capital, and lack of technology. As a result, they are still dependent on local collectors. To overcome these obstacles, fishermen try to cooperate with fellow fishermen, participate in training, and seek alternative income when sea conditions are unfavorable. These findings underscore the need for further support for the economic empowerment of fishermen in remote areas such as Miang Island.

Lake Toba, designated as a National Tourism Strategic Area, faces ecological disruption due to the invasive Red Devil fish (Amphilophus labiatus), which threatens the sustainability of native aquatic species. This study aims to enhance the knowledge of the Tapian Nauli farmer group in Hariara Pohan Village, Samosir Regency, in utilizing the Red Devil fish as Liquid Organic Fertilizer (LOF) and processed food. Methods employed include agricultural extension activities, practical demonstrations, pre-tests and post-tests, and evaluation through questionnaires. Results showed a significant improvement in farmers' knowledge after the extension, with 70% moving from the "poor" to "good" category. The Red Devil fish was successfully processed into LOF through fermentation using molasses, starbio, and pineapple, and into shredded fish (abon) as a food product. Farmers responded positively to the idea of Red Devil abon as a potential household business opportunity, given the fish's abundance and low cost. Evaluation of the extension activities revealed a high level of suitability with an average score of 96.33%, covering material content, delivery methods, and instructional media. This study demonstrates that locally based extension approaches can effectively empower farmers to convert invasive pests into value-added products, while fostering economic opportunities rooted in local resources.

Tongkol fish is one of the abundant sources of animal protein and is easily found in coastal areas, including Pantai Amal Village. However, the utilization of tongkol fish by the community is still limited to traditional processing that is less varied. On the other hand, fellow students often face challenges in meeting daily nutritional needs due to economic limitations and instant consumption patterns that are low in nutrition. This study aims to develop innovations in processing tongkol fish into spicy shredded fish as an economical, nutritious, and practical food solution. The research methods include the production process, taste testing, and analysis of production and consumption costs. The results show that spicy shredded fish has a high protein content, a taste that consumers like, and a fairly long shelf life so that it is suitable as a daily food stock. In addition, this product is proven to be more economical than consuming fast food, so it is effective in helping students from out of town manage their expenses while meeting their nutritional needs. This innovation also has the potential to increase the added value of tongkol fish and support local food security in coastal areas.