Petroleum contamination is a significant concern for both the environment and human health. Various methods have been used for the remediation of petroleum-contaminated seawater. In this study, a laccase-producing bacterial consortium was selected and used for the remediation of dieselcontaminated seawater. Moreover, this consortium was integrated with a microbial fuel cell to recover electrical energy from the diesel degradation. The results found that the bacterial consortium MS exhibited the highest laccase activity (28.13±0.20 U/mL) and achieved a 97.85±0.52% diesel degradation rate. Metabolomic analysis revealed the presence of several degradation products, including ethylbenzene, 1,3-dimethylbenzene, propylbenzene, 1-(1-propynyl)-1-cyclohexene, 1,2,4-trimethylbenzene, benzene, 1,1’-(1,2-dimethyl-1,2-ethanediyl) bis, and hentriacontane. Furthermore, a floating microbial fuel cell (MFC) coupled with the consortium generated a maximum power density (PD) of 0.18±0.00 W/m³ and a maximum current density (CD) of 0.53±0.01 A/m³. These findings highlight the potential of marine bacterial consortia with laccase activity for bioremediation of diesel-contaminated seawater, coupled with the added benefit of bioenergy recovery.