rekeneis

rekeneis is a small, deep‑water marine organism first described in 2017 by marine biologists from the University of Bergen. It belongs to the class Hydrozoa within the phylum Cnidaria and is classified under the newly established genus rekeneis. The species is characterized by translucent, filamentous colonies that can grow up to 30 centimeters in length. Unlike many hydrozoans, rekeneis exhibits bioluminescent properties that are triggered by low light levels, producing a faint blue glow in its tentacles. The organism's tentacles house specialized nematocysts that are primarily used for capturing planktonic prey rather than for defense.

The colonies of rekeneis are typically found at depths ranging from 200 to 500 meters in the North Atlantic Ocean, particularly around the continental shelf edges near Iceland and Svalbard. They are most abundant in colder waters where nutrient upwelling is frequent. Studies have shown that rekeneis prefers slightly acidic pH conditions, suggesting that it may serve as an indicator species for ocean acidification monitoring. A 2021 survey estimated the global population of this species to be in the millions, though its secretive nature makes accurate counts difficult.

Research into rekeneis has revealed potential applications in biotechnology. The bioluminescent proteins extracted from the organism have shown promise in developing low‑energy lighting systems and in bio‑imaging techniques. Additionally, the unique composition of its nematocysts may inspire new drug delivery mechanisms. Future studies aim to determine the impact of climate change on rekeneis distribution and to explore its ecological role within deep‑sea food webs.