Both sexes develop swimming setae, detach from the flounder or lumpfish and again swim freely as pelagic organisms.

Stomach analysis has also shown that the diet consists mostly of pelagic or bathypelagic organisms.

The medusa part of the life cycle is a pelagic organism, which is budded off a bottom-living polyp in late spring.

Most pelagic organisms are found over the continental shelves, where food is plentiful.

As such, they were well-adapted to life as fully pelagic organisms (i.e. they never came onto land).

Teuthidodrilus is thought to be a previously unobserved genus which may represent a transition between the benthos and the pelagic organisms.

Bioluminescence is found in the sea at all levels.: planktonic, pelagic and benthic organisms.

It was presumably a pelagic (or swimming) organism, living in open waters above the stagnant basin that received the Burgess mudslide.

As they enter coastal waters, the animals essentially transform from a pelagic oceanic organism to a benthic continental organism.

Newly emerged hatchlings are carnivorous, pelagic organisms, part of the open ocean mini nekton.