This paper reviews the marine energy industry using traditional and bibliometric analysis, complemented by PESTEL analysis to assess opportunities and challenges beyond technological issues. The study identifies key opportunities such as renewable energy targets, greenhouse gas reduction goals, job creation, skill transfer, renewable support, and low GHG emissions. Challenges include device design inconsistencies, high initial costs, inadequate legal frameworks, funding shortages, regulatory fragmentation, poor macroeconomic indicators, environmental constraints, and competition from other renewable sources. Bibliometric analysis from 2013 to 2023 reveals that tidal power is the primary focus, with research emphasizing efficiency improvements and resource potential. Recommendations include government-private sector cooperation, increased public education, collaboration with existing marine sector players, and enhanced R&D. The study provides a comprehensive overview of the marine energy sector, offering insights for decision-makers and researchers.This paper reviews the marine energy industry using traditional and bibliometric analysis, complemented by PESTEL analysis to assess opportunities and challenges beyond technological issues. The study identifies key opportunities such as renewable energy targets, greenhouse gas reduction goals, job creation, skill transfer, renewable support, and low GHG emissions. Challenges include device design inconsistencies, high initial costs, inadequate legal frameworks, funding shortages, regulatory fragmentation, poor macroeconomic indicators, environmental constraints, and competition from other renewable sources. Bibliometric analysis from 2013 to 2023 reveals that tidal power is the primary focus, with research emphasizing efficiency improvements and resource potential. Recommendations include government-private sector cooperation, increased public education, collaboration with existing marine sector players, and enhanced R&D. The study provides a comprehensive overview of the marine energy sector, offering insights for decision-makers and researchers.