Some members of the Botrynema brucei ellinorae subspecies have growths on their bells (image), while others do not. (Image courtesy of the University of Western Australia)
A mysterious ocean barrier is preventing some deep-sea Arctic jellyfish from reaching the Atlantic Ocean, a new study has found.
These creatures, a subspecies of the jellyfish Botrynema brucei ellinorae, live at depths ranging from 3,300 to 6,600 feet (1,000 to 2,000 meters) and can be divided into two groups based on the presence or absence of growths on their umbrella-like structure.
“This jellyfish […] has two different forms depending on its location: one with a characteristic growth on top, and one without it,” lead author Javier Montenegro, a biologist at the University of Western Australia, said in a statement.
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