Like other ctenophores, B. abyssicola has a simple nervous system in the form of a nerve net, which it uses to direct its movement, feeding, and hunting behaviors.

[2] Like other Beroida, B. abyssicola has a very different body plan from other Ctenophores, namely the lack of any tentacles in any life stage.

[4] The mesoglea of Beroe have large smooth muscle fibers, which allows the ctenophore the flexibility to swallow much of its prey whole.

Beroe has a defense response that retracts the entire aboral organ inside the body of itself for protection.

There is a band of sensory cells surrounding the mouth of abyssicola that can detect chemical and mechanical stimuli.

[5] It has been hypothesized that the nervous systems of Beroe abyssicola, along with other Ctenophores, evolved independently of those of other animals.

B. abyssicola possesses a large pharynx that spans nearly the length of the body to digest its food, using pharyngeal muscles and macrocilia to keep its mouth closed and prey inside.

Once digested, the food then moves through the gastrovascular system in canals, which supplies nutrients throughout the mesoglea.

[11] Like other ctenophores, B. abyssicola has a rainbow effect on its comb rows caused by light refraction, but it also possesses bioluminescence.