<p>Marine sediments contaminated with hydrocarbons pose severe ecological risks, which need to be addressed with proper remediation approaches to mitigate their effects. Bioremediation includes promising approaches, but their effectiveness depends on the success of microbial colonization, i.e. the establishment of active pollutant-degrading microorganisms in sediments. Still, bioremediation is hindered by environmental, chemical, biological, and physical barriers. This review examines the limitations imposed by these barriers and explores the strategies to overcome them. The environmental barriers include extreme temperatures, salinity fluctuations, oxygen limitations, and pH imbalances, which can be addressed by selecting and adapting robust microbial strains to these conditions while strictly controlling or even modifying them. Chemical barriers, including toxic pollutants and nutrient imbalances, are addressed through resistant microbes, biosorption and biotransformation techniques, and innovative nutrient-delivery methods such as nanoparticle-assisted systems. Biological barriers, i.e., resistance to colonization, include competition with native microbial communities and predation, which can be addressed through bioaugmentation with compatible strains, microbial encapsulation for protection, and modulation of quorum sensing to foster cooperative interactions. Physical barriers arising from sediment properties and hydrodynamic conditions are addressed via mechanical mixing, the addition of permeable materials, and the use of carrier substrates to enhance microbial attachment. We also explore advanced technologies such as nanoparticle technology and artificial intelligence (AI). Nanoparticles play critical roles in pollutant removal, nutrient delivery, and microbial protection, while AI facilitates the design of effective microbial consortia and optimization of bioremediation processes. Despite these promising strategies, challenges remain in scaling up, ensuring environmental safety, and navigating regulatory frameworks. We emphasize the need for interdisciplinary collaboration and technological innovation.</p> Graphical Abstract <p></p>