[6] Its diet changes as it matures, from benthic invertebrates such as crustaceans and holothuroids when young to mesopelagic and bathypelagic fish, sea urchins and cephalopods when adult.

The sensory specialty of C. armatus also changes over its lifecycle; juveniles are more reliant on sight than olfaction, but developed adults are considered to be olfactory specialists.

[7] Very few ripe females, and no spent individuals have been collected, and this is suggestive of this species being semelparous.

[1] A study done on the influence of carrion supply in the role of temporal changes in grenadier abundance showed a direct positive correlation to amount of carrion and the population of abyssal grenadier in the eastern North Pacific.

[12] C. armatus has been observed to maintain low metabolic rates and slow aerobic activity in their foraging; these behaviors are thought to reflect a need to conserve energy due to the extreme environmental conditions and food scarcity that exists in C. armatus' natural habitats.