arenibacter echinorum arenibacter echinorum arenibacter echinorum is a heterotrophic and aerobic bacterium from the genus arenibacter which has been isolated from the sea urchin strongylocentrotus intermedius from the sea of japan. arenibacter echinorum scientific classification domain: bacteria phylum: bacteroidota class: flavobacteriia order: flavobacteriales family: flavobacteriaceae genus: arenibacter species: a. echinorum binomial name arenibacter echinorumnedashkovskaya et al. 2007 type strain dsm 23522, kctc 22013, kmm 6032, lmg 22574