<p>Engineered nanoparticles (ENPs) are becoming increasingly prevalent in the marine environment due to the rapid expansion of nanotechnological applications in diverse industries including electronics, energy, medicine, cosmetics, construction, textiles, and agriculture. Physical and physicochemical characteristics of ENPs including size, shape, solvability, agglomerate state, and crystalline structure make their behaviour challenging to understand in the marine environment. Experimental studies have reported that ENPs cause inflammation, disrupt cell division, and induce cell death in marine food organisms, primarily through excessive production of reactive oxygen species (ROS) that impair antioxidant defenses and lead to oxidative stress, DNA damage, and lipid peroxidation. Exposure studies have indicated that high concentrations of ENPs result in increased accumulation within marine organisms, particularly in filter feeders. There is evidence for the occurrence of ENPs in the marine environment, including in seafood organisms, and this trend is expected to increase substantially in the future. Ecological consequences of ENPs in the marine environment could ultimately be a potential threat to future seafood security and safety, alongside multitude of other contributing factors. The limited availability of conclusive findings on ENPs in the marine environment emphasizes the critical importance of advancing research in this area.</p>