sp. nov., isolated from aquaculture seawater.

A novel marine bacterium, designated strain 216LB-ZA1-12, was isolated from a aquaculture seawater sample. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain 216LB-ZA1-12 belonged to the genus , with the highest sequence similarity to MKT133 (97.7 %), followed by GH1-24 (97.0 %), CAU 1294 (96.6 %) and LMG 23452 (96.1 %). The average nucleotide identity and the DNA-DNA hybridization estimate values between strain 216LB-ZA1-12 and four close type strains were between 69.2-71.3% and 16.7-17.8 %, respectively. The bacterium was Gram-stain-negative, facultatively anaerobic, oxidase and catalase positive, oval- to rod-shaped, and motile. Growth was observed at pH 7-9, salinities of 1-15% and temperatures of 4-42 °C. The G+C content of the chromosomal DNA was 48.50 mol%. The major respiratory quinone was determined to be Q-10. The principal fatty acids were summed feature 8 (C ωω) and C. The major polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine and aminophospholipid. The combined genotypic and phenotypic data show that strain 216LB-ZA1-12 represents a novel species within the genus , for which the name sp. nov. is proposed, with the type strain 216LB-ZA1-12 (=MCCC 1A14570=KCTC 72144).