A novel, aerobic, heterotrophic, orange-pigmented, Gram-staining-negative, rod-shaped, gliding bacterial strain, designated JLT2000T, was isolated from surface water of the South China Sea. The strain was oxidase- and catalase-positive. The major cellular fatty acids of strain JLT2000
T
were C12 : 0, iso-C15 : 1 G, iso-C15 : 0, iso-C17 : 0 3-OH, summed feature 3 (comprising C16 : 1ω7c and/or C16 : 1ω6c), C16 : 0 and C18 : 0. MK-7 was the major respiratory quinone and the major polar lipids were phosphatidylcholine and phosphatidylethanolamine. The genomic DNA G+C content of strain JLT2000T was 37.9 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain JLT2000T formed a branch within the genus
Marivirga
, but was clearly separated from the two established species of this genus,
Marivirga tractuosa
and
Marivirga sericea
. The 16S rRNA gene sequence similarity of strain JLT2000T with the type strains of these two species was 95.8 % and 96.1 %, respectively. Strain JLT2000T had a shorter cell length and wider growth range in different temperatures and salinities than those of
Marivirga tractuosa
NBRC 15989T and
Marivirga sericea
NBRC 15983T. In addition, strain JLT2000T could utilize more carbon sources and hydrolyse more polymers than
Marivirga tractuosa
NBRC 15989T and
Marivirga sericea
NBRC 15983T. Based on this polyphasic analysis, strain JLT2000T represents a novel species of the genus
Marivirga
, for which the name Marivirga lumbricoides sp. nov. is proposed. The type strain is JLT2000T ( = JCM 18012T = CGMCC 1.10832T).