A Gram-staining-negative, aerobic, red-pigmented, motile with a single polar flagellum and rod-shaped bacterium, designated HNIBRBA332T, was isolated from an aquaculture seawater sample. Phylogenetic analysis based 16S rRNA gene sequences revealed that strain HNIBRBA332T belonged to the genus Hahella of the family Hahellaceae and shared 95.3-99.9% sequence similarities with Hahella species. Whole genome sequencing of strain HNIBRBA332T revealed the genome size of 7.2Mbp and the G+C content of 59.5%. The HNIBRBA332T genome shared 89.0% of average nucleotide identity and 36.6% of digital DNA-DNA hybridization values to the genome of Hahella chejuensis KCTC 2396T, the type species of the genus. Genes involved in prodigiosin biosynthesis were identified in the genome. The strain contained C17:0 10-methly, summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C18:1 ω9c and C20:4 ω6,9,12,15c as the major fatty acids and menaquinone-7 as the major respiratory quinone. The major polar lipids were phosphatidylglycerol, phosphatidylethanolamine, and two unidentified aminolipids. On the basis of phylogenetic and phenotypic characteristics, strain HNIBRBA332T is considered to represent a novel species of the genus Hahella, for which the name Hahella aquimaris (type strain HNIBRBA332T) sp. nov., is proposed.
Keywords: Hahella; Novel species; Prodigiosin.
© 2025. The Author(s), under exclusive licence to Springer Nature Switzerland AG.