design: Genomic DNA from *Marinobacter sp.* was fragmented to 350550 bp using a Covaris M220 ultrasonicator. Libraries were prepared with the NEBNext Ultra II DNA Library Prep Kit, including end repair, A-tailing, and ligation of Illumina TruSeq Unique Dual Index (UDI) adapters. PCR amplification (812 cycles, KAPA HiFi HotStart ReadyMix) was performed to enrich adapter-ligated fragments. Final libraries were size-selected using AMPure XP beads and validated for fragment size distribution (Agilent 4200 TapeStation) and concentration (Qubit 4.0). Paired-end sequencing (2150 bp) was performed on an Illumina NovaSeq 6000 S4 flow cell.