These movements are thought to be in response to vertical migrations of prey organisms in the deep scattering layer.

Detection methods may also be divided into direct detection of the prey organism itself, and indirect clues, such as the smell of its urine.

Bythotrephes can consume 10-20 prey organisms a day.

Most species of Difflugia are heterotrophs, feeding on organic matter or various prey organisms.

Another theory suggests that alarm signals function to attract further predators, which fight over the prey organism, giving it a better chance of escape.

In other cases, the prey organism may die in the mouth or digestive system of the predator.

While that particular prey organism may be killed, the coloring benefits the prey species as a whole.

Eating a prey organism may simply make room for another if the prey population is approaching its carrying capacity.

The emerging young attack and feed on the paralysed prey organism in its own home.

While feeding on prey organisms the rostrum is inserted into the body of the prey and the cytoplasm is sucked out.