Cnidarians at the Hawaii-2 Observatory

Observed in video surveys (ROV Jason in 1998 and 1999 and ROV JasonII in 2003 and 2004) and/or camera sled/otter trawl transects (in 2003)

 

Except for those species verified by collection (indicated by *), these classifications are best guesses and subject to change.  Classification was checked first with Tree of Life and then with European Register of Marine Species in June 2006.
Click on the filename prefix for additional photos of that specific type of organism.
*** NOTE FOR BENTHIC VS. PELAGIC: Organisms were classified as benthic if they were observed at least some times on the seafloor. ***

*** NOTE FOR VIDEO CLIPS: Video clips on this page are Windows Media Video 8 files (*.WMV).  Click for a list of all video clips (including MPEG and MOV files). ***

 

Class, Order
Family
Genus, species
(* verified by collection)
Common Name
Filename Prefix
Type Photo
Benthic or Pelagic?
Hydrozoa, Anthomedusae, Capitata
Corymorphidae Branchiocerianthus (imperator?)
Solitary hydroid
cni_hyd_1
Branchiocerianthus
Benthic
Hydrozoa
Not determined
Colonial hydroid cni_hyd_2
hydroid_on_jbox
Benthic
Hydrozoa, Siphonophorae
Not determined
Siphonophore
cni_sip_1
siphonophore
Pelagic
Hydrozoa, Trachymedusae Rhopalonematidae

Voragonema (= Benthocodon) (pedunculata?)

Jellyfish
cni_med_1
Benthocodon
Click for video
Pelagic
Hydrozoa, Trachymedusae Rhopalonematidae
Crossota (rufobrunnea?)
Jellyfish cni_med_2
Crossota
Pelagic
Hydrozoa, Trachymedusae Rhopalonematidae
Crossota millsae
Jellyfish cni_med_3
Crossota_millsae
Pelagic
Hydrozoa, Narcomedusae
Aeginidae
Aegina (citrea?)
Jellyfish cni_med_4
Aegina
Pelagic
Hydrozoa, Narcomedusae Aeginidae Aegina? Aeginura?
Jellyfish cni_med_5
8-tentacle
Pelagic
Hydrozoa or Scyphozoa
Similar to Poralia
Jellyfish cni_med_6
Poralia-like
Pelagic
Hydrozoa or Scyphozoa
Not determined
Jellyfish cni_med_7
medusa
Pelagic
Anthozoa, Octocorallia Pennatulidae
Not determined
Sea pen
cni_pen_1
seapen
Benthic
Anthozoa?, Octocorallia? Umbellulidae?
Similar to Umbellula
Stalked octocoral?
cni_pen_2
octocoral
Benthic
Anthozoa, Hexacorallia, Actiniaria *
Actinoscyphiidae or Actinernidae or Hormathiidae
Actinoscyphia or Actinernus or Actinauge
Sea anemone
cni_act_1
anemone Benthic
Anthozoa, Hexacorallia, Actiniaria Actiniidae?
Bolocera? Sea anemone cni_act_2
anemone
Click for video
Benthic
Anthozoa, Hexacorallia, Actiniaria?

Not determined
Sea anemone
cni_act_3
anemone
Benthic

Total number of morphotypes of cnidarians identified: 15.
Benthic: 7 types; planktonic: the other 8 types.


*** We would like to thank the following taxonomic specialists for helping identify the cnidarians: D. Calder, D. Fautin, L. Lovell, J. Ljubenkov, G. Matsumoto, F. Pages, and K. Raskoff. ***


Link to WHOI Technical Report (PDF)
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Page updated 8 Aug. 2006 by Stace Beaulieu (stace@whoi.edu)