Modern approaches to marine antifouling coatings focus on developing environmentally friendly alternatives to traditional antifouling systems, particularly in response to the 2001 International Maritime Organization (IMO) ban on tributyltin (TBT). Antifouling coatings are essential for protecting marine structures such as ship hulls from biofouling, which can increase drag, fuel consumption, and maintenance costs. Current alternatives include tin-free self-polishing copolymers (SPC) and foul release technologies, but many other options are being explored. Biofouling involves the accumulation of marine organisms on surfaces, starting with the formation of biofilms and progressing to the settlement of macrofoulers. The process is influenced by factors such as surface chemistry, water flow, and the presence of conspecific cues. Biofilms play a critical role in the initial stages of fouling, providing a matrix that supports the growth of larger organisms. Historically, antifouling systems relied on toxic biocides, but these have been replaced due to environmental concerns. Modern alternatives include booster biocides, foul release coatings (FRCs), and biomimetic approaches inspired by natural antifouling mechanisms. FRCs use low surface energy to prevent organisms from adhering, while biomimetic coatings mimic natural surfaces to reduce fouling. The development of environmentally acceptable antifouling systems requires a balance between effectiveness and environmental impact. Research into natural products, such as halogenated furanones from red seaweed, has shown promise in inhibiting fouling. Additionally, microtextured surfaces and biomimetic designs are being explored to reduce biofouling. Despite advancements, challenges remain, including the need for long-term effectiveness, the impact of biofilms on coating performance, and the potential for alien species transport. Future research aims to develop more sustainable and efficient antifouling solutions that meet environmental and operational requirements.Modern approaches to marine antifouling coatings focus on developing environmentally friendly alternatives to traditional antifouling systems, particularly in response to the 2001 International Maritime Organization (IMO) ban on tributyltin (TBT). Antifouling coatings are essential for protecting marine structures such as ship hulls from biofouling, which can increase drag, fuel consumption, and maintenance costs. Current alternatives include tin-free self-polishing copolymers (SPC) and foul release technologies, but many other options are being explored. Biofouling involves the accumulation of marine organisms on surfaces, starting with the formation of biofilms and progressing to the settlement of macrofoulers. The process is influenced by factors such as surface chemistry, water flow, and the presence of conspecific cues. Biofilms play a critical role in the initial stages of fouling, providing a matrix that supports the growth of larger organisms. Historically, antifouling systems relied on toxic biocides, but these have been replaced due to environmental concerns. Modern alternatives include booster biocides, foul release coatings (FRCs), and biomimetic approaches inspired by natural antifouling mechanisms. FRCs use low surface energy to prevent organisms from adhering, while biomimetic coatings mimic natural surfaces to reduce fouling. The development of environmentally acceptable antifouling systems requires a balance between effectiveness and environmental impact. Research into natural products, such as halogenated furanones from red seaweed, has shown promise in inhibiting fouling. Additionally, microtextured surfaces and biomimetic designs are being explored to reduce biofouling. Despite advancements, challenges remain, including the need for long-term effectiveness, the impact of biofilms on coating performance, and the potential for alien species transport. Future research aims to develop more sustainable and efficient antifouling solutions that meet environmental and operational requirements.