Crossota millsae

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Crossota millsae
Scientific classification edit
Kingdom: Animalia
Phylum: Cnidaria
Class: Hydrozoa
Order: Trachymedusae
Family: Rhopalonematidae
Genus: Crossota
C. millsae
Binomial name
Crossota millsae
Thuesen, 2003

Crossota millsae is a species of deep-sea hydrozoan.[1] Males and females have both been described, and it reproduces sexually. They are viviparous and females brood baby medusae attached to the gastric canals inside the sub-umbrellar space.


Crossota millsae was first described from the Pacific Ocean off Hawaii and California.[1] It was subsequently found in the Arctic Ocean[2][3] and in Guayanilla Canyon off Puerto Rico.[4] NOAA researchers who filmed this species in 2018 near Puerto Rico called it a "psychedelic" jellyfish.[5] It lives below 1 km depth in all four regions. Its highest abundance is found at 2500 m off California and 1250 m off Hawaii. In the Arctic Ocean, it has been observed sitting on the seafloor.[6]


It was named after Dr. Claudia Mills, a marine scientist at the Friday Harbor Laboratories.


  1. ^ a b Thuesen, E.V., 2003. Crossota millsae (Cnidaria: Trachymedusae: Rhopalonematidae), a new species of viviparous hydromedusa from the deep sea off California and Hawaii. Zootaxa, 309: 1-12
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  5. ^ 'Psychedelic' jellyfish wows deep-sea explorers - CNN Video, retrieved 2018-11-21
  6. ^ Raskoff, K.A., R.R. Hopcroft, K.N. Kosobokova, J.E. Purcell, & M. Youngbluth, 2009. Jellies under ice: ROV observations from the Arctic 2005 hidden ocean expedition, Deep-Sea Research Part II

External links[edit]