Anthropogenic noise is an emerging global pollutant in aquatic ecosystems, largely driven by shipping, offshore development, and new activities such as deep-sea mining. Its impacts are expected to intensify as human presence expands into previously less disturbed regions, including the polar seas. While marine mammals have historically been the primary focus of research, invertebrates remain heavily understudied despite their diversity and crucial ecological role. Existing studies were analyzed to reveal strong taxonomic and methodological biases: most focus on crustaceans, bivalves, and cephalopods, and often assess either physiological or behavioral responses in isolation. However, these responses do not always align, as physiological stress may occur without obvious behavioral changes, and behavioral shifts may only arise once physiological thresholds are exceeded. Integrating both approaches, across different life stages and under ecologically realistic conditions, is therefore essential to capture the full spectrum of impacts. Addressing these challenges requires refined methodologies, broader taxonomic coverage, and stronger interdisciplinary collaboration between physiology and ethology. Advancing knowledge on invertebrate responses to noise will provide more robust insights into species- and ecosystem-level effects, supporting a holistic understanding of how anthropogenic noise alters aquatic ecosystems.