vagococcus penaei vagococcus penaei vagococcus penaei is a species of bacteria. it is gram-positive, catalase-negative and coccus-shaped. its type strain is cd276t (=lmg 24833t =cip 109914t). vagococcus penaei scientific classification domain: bacteria phylum: bacillota class: bacilli order: lactobacillales family: enterococcaceae genus: vagococcus species: v. penaeijaffrès et al. 2009