Draft Genome Sequence of Monaibacterium marinum C7T, Isolated from Seawater from the Menai Straits, Wales, United Kingdom.

Here, we report the draft genome sequence of Monaibacterium marinum C7T, a strain that represents a new member of the Roseobacter clade of the family Rhodobacteraceae (Alphaproteobacteria). The genome size of Monaibacterium marinum C7T is 3.7 Mb (3,734,267 bp), with a G+C content of 58.86%.