Tenacibaculum aestuariivivum sp. nov., isolated from a tidal flat.

A Gram-stain-negative, aerobic, non-motile, non-spore-forming bacterial strain, designated JDTF-79 ^T , was isolated from a tidal flat in Jindo, an island of South Korea, and subjected to a taxonomic study using a polyphasic approach. Strain JDTF-79 ^T grew optimally at 25 °C and in the presence of 2.0 % (w/v) NaCl. Phylogenetic trees based on 16S rRNA gene sequences showed that strain JDTF-79 ^T fell within the clade comprising the type strains of species of the genus Tenacibaculum, clustering with the type strains of Tenacibaculum dicentrarchi, Tenacibaculum ovolyticum, 'Tenacibaculum haliotis' and Tenacibaculum soleae. The novel strain exhibited highest 16S rRNA gene sequence similarity (98.3 %) to the type strain of T. dicentrarchi and sequence similarities of 93.5-96.9 % to the type strains of the other species of the genus Tenacibaculum. Strain JDTF-79 ^T contained MK-6 as the predominant menaquinone and anteiso-C15 : 0, iso-C15 : 0 3-OH and iso-C15 : 0 as the major fatty acids. The major polar lipids of strain JDTF-79 ^T were phosphatidylethanolamine, one unidentified lipid and one unidentified aminophospholipid. The DNA G+C content of strain JDTF-79 ^T was 30.3 mol%. Strain JDTF-79 ^T had a mean DNA-DNA relatedness value of 19 % with the type strain of T. dicentrarchi. The differential phenotypic properties, together with the phylogenetic and genetic data, revealed that strain JDTF-79 ^T is separated from other recognized species of the genus Tenacibaculum. On the basis of the data presented, strain JDTF-79 ^T is considered to represent a novel species of the genus Tenacibaculum, for which the name Tenacibaculum aestuariivivum sp. nov. is proposed. The type strain is JDTF-79 ^T (=KCTC 52980 ^T =NBRC 112903 ^T ).