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Deepstaria vs Portuguese Man o' War

Deepstaria
VS
Portuguese Man o' War

Both are unusual gelatinous ocean drifters, but one is a single deep-sea jellyfish while the other is not really one animal at all.

Deepstaria Portuguese Man o' War
Scientific name Deepstaria enigmatica Physalia physalis
Single animal or colony A single jellyfish A colony of four specialised zooid types
Feeding method Folds its sheet-like bell around prey to engulf it Stings and paralyses prey with long trailing tentacles
Body shape An enormous, thin, sheet-like bell A gas-filled float trailing long tentacles
Habitat depth Deep, dark ocean water Floats at the ocean surface
Danger to humans Not known to be harmful Delivers an intensely painful sting
Conservation status Least Concern Not Evaluated
Habitat Ocean Ocean, coastal

Deepstaria vs Portuguese Man o' War: common questions

Is the deepstaria a colony like the Portuguese man o' war?

No, the deepstaria is a single jellyfish, while the Portuguese man o' war is a siphonophore, a colony made up of four different types of specialised zooids that function together as one unit.

Which one poses a sting risk to humans?

The Portuguese man o' war poses the sting risk, its long trailing tentacles delivering an intensely painful sting, while the deepstaria is not known to pose any comparable danger to people.

Which one lives at the surface and which lives in the deep sea?

The Portuguese man o' war floats at the ocean surface, carried by the wind, while the deepstaria lives in deep, dark ocean water far below, rarely observed directly by researchers.

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