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The article reports on the study of terminal electron acceptors (TEA). It aims to determine the effect of TEA on the development of strain Shewanella halefaxensis HAW-EB4. It also examines the role of TEA in the enzymic processes involved in the metabolism of hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX). It shows that HAW-EB4 used periplasmic proteins in transforming RDX to nitroso and ring cleavage products. It also demonstrates that HAW-EB4 creates different sets of c-type chromosomes in different TEA and trimethylamine N-oxide (TMAO). The study also indicates that cytochrome and TMAO-reducing conditions are involved in RDX metabolism.