Contributing to the oceanic turn, this photographic catalogue presents artistic shoots that portray the collective construction of transformative knowledge mediated through the investigation of the marine plastic pollution issue. The shoots have been taken during the project "SeaPaCS Participatory Citizen Science against Marine Pollution" (June-December 2023) in the coastal small city of Anzio (Rome, Italy), supported by the European Commission funds of the IMPETUS4CS project and coordinated by Chiara Certomà (DIGGEO@ESOMAS laboratory, University of Turin), Federico Fornaro (Italian Naval League Anzio) and Luisa Galgani (Marine Biochemistry Division of GEOMAR Helmholtz Centre for Ocean Research Kiel). Artistic and creative expression is a powerful means to stimulate the citizens' interest in and fascination with the Ocean, and has the capacity to motivate, trigger and support commitments to socio-environmental issues. During the SeaPaCS project, photography called citizens to engage with the problem not merely cognitively, but also socially and emotionally. It crucially contributes to knowledge production on the investigated issue, fosters discussion on what is happening through the choice of frames, lights and contributes technical solutions, and triggers interventions, as emotion may lead to action.