photobacterium ganghwense photobacterium ganghwense photobacterium ganghwense is a gram-negative, oxidase and catalase positive, motile bacteria of the genus photobacterium. photobacterium ganghwense are found in marine environment. s.i. paul et al. (2021) isolated, characterized and identified photobacterium ganghwense from marine sponges of the saint martin's island area of the bay of bengal, bangladesh. photobacterium leiognathi scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: vibrionales family: vibrionaceae genus: photobacterium species: p. ganghwense binomial name photobacterium ganghwensepark et al. 2006 biochemical characteristics of photobacterium ganghwense colony, morphological, physiological, and biochemical characteristics of photobacterium ganghwense are shown in the table below. test type test characteristics colony characters size medium type round color creamy shape convex morphological characters shape rod physiological characters motility + growth at 6.5% nacl + biochemical characters gram’s staining – oxidase + catalase + oxidative-fermentative oxidative motility + methyl red + voges-proskauer – indole + h2s production – urease v nitrate reductase + β-galactosidase – hydrolysis of gelatin + aesculin v casein v tween 40 + tween 60 + tween 80 + acid production from glycerol + galactose + d-glucose + d-fructose v d-mannose – mannitol v n-acetylglucosamine v amygdalin + maltose v d-melibiose + d-trehalose + glycogen v d-turanose v note: + = positive; – =negative; v =variable (+/–)