The purpose of this study was to develop specific English learning materials for eleventh- grade students in the fisheries program at SMKN 3 Enrekang. The study adopted a research and development (R&D) approach based on English for Specific Purposes (ESP) and followed a systematic process to ensure the materials' relevance and quality. The study began with a needs analysis conducted on June 14, 2024, to identify the students' target and specific learning needs, focusing on their academic and professional contexts. The analysis revealed requirements for fishery-related terminology, practical communication skills, and task-based competencies relevant to their field. Based on these findings, a course grid was designed as the foundation for developing three instructional units. Each unit consisted of fourteen tasks, encompassing reading, vocabulary, speaking, listening, grammar, writing, and reflection activities. The developed materials were evaluated by an English teaching expert using BNSP criteria and received an average score of 3.55, categorized as "very good." Following the expert review, the materials were revised to enhance content accuracy. The final version of the materials aligns with students' specific needs and the learning objectives of vocational training in the fisheries sector. The results demonstrate that the developed materials are significant for both academic and vocational purposes, equipping students with language skills tailored to their educational and career goals. This study contributes to the field of ESP by providing a model for designing context-specific instructional materials for vocational high schools, particularly in the fisheries sector.