Which of the following organisms is most likely to spoil a food such as salted fish? Choose one: A. Cenarchaeum symbiosum B. Thermococcus litoralis C. Halobacterium species D. Nanoarchaeum equitans

C Halobacterium species

Explanation:

ThIs is because this species of bacteria thrive well in high salt concentrations; and will  be inactive in a low  salt concentration medium.They are known  as Hallophilic Organisms. (salt organism)s

They are  rod-shaped, motile organisms , which  reproduced by binary fission,live in saline lakes, with  the cell bounded by a single layer of  plasma membranes.They  contain beta-caroteen pigments. it is this that is responsible for their red coloration.When this pigment is extracted, is  used in food dye. giving food red coloration.

In addition, Halo. Bacteria contain some  enzymes that can break dowm organic  molecules to simplest forms. These are  Degredative enzymes.(e.g Lipase , Amylases). it is this  feature that aids their application    for aiding  the  process of  fermentation of salty foods, and also aiding  of coffee processing during production.

Since this is called a salty bacterium, and its enzymes will be most active in high salty concentrations, then option C is the correct answer.