Scientists aim to describe a single 'tree of life' that reflects the evolutionary relationships of living things. However, evolutionary relationships are a matter of ongoing discovery, and there are different opinions about how living things should be grouped and named. EOL reflects these differences by supporting several different scientific 'classifications'. Some species have been named more than once. Such duplicates are listed under synonyms. EOL also provides support for common names which may vary across regions as well as languages.

Preferred marks the preferred classification for this taxon.

Recognized By Rank Classification
Species 2000 & ITIS Catalogue of Life: April 2013
view in classification
Paleobiology Database
view in classification
Animal Diversity Web Descriptions
AquaMaps Resource Phylum
AskNature Phylum
BOLDS resource for higher-level taxa
  • Cnidaria
BOLDS resource for higher-level taxa
BOLD images
  • Cnidaria
BOLDS images II Phylum
BOLDS resource for species-level taxa Phylum
BioImages resource Phylum
BioImages resource
Cod Stomach Data, ICES, 1996
Conabio Phylum
EOL Group on Flickr Phylum
EOL Group on Flickr Phylum
EOL Interns
  • Cnidaria
EOL hotlist Scratchpad Phylum
  • Cnidaria
  • Cnidaria
Encyclopedia of Marine Life of Britain and Ireland Resource Phylum
Environments Phylum
Environments Phylum
Environments Phylum
view in classification
Freshwater and Marine Image Bank, University Libraries, U Washington
GBIF national node classification resource: Germany Phylum
GBIF national node type records: France Phylum
GBIF national node type records: Germany Phylum
GBIF national node type records: Netherlands Phylum
GBIF national node type records: United Kingdom Phylum
Global Biotic Interactions
Global Biotic Interactions Phylum
Herring, 1987 Phylum
IABIN resource Phylum
IUCN Red List Phylum
IUCN Red List
view in classification
Phylum Import
Integrated Taxonomic Information System (ITIS)
view in classification
Inventaire National du Patrimoine Naturel Phylum
Library of Alexandria Phylum
MCZ resource Phylum
MarLIN resource Phylum
Mineralogy Phylum
Moorea Biocode
  • Cnidaria
Morphbank Resource Phylum
NCBI Taxonomy
view in classification
NMNH Invertebrate Zoology resource Phylum
Natural History Museum Species of the day Phylum
NatureServe resource Phylum
OBIS depth range resource Phylum
OBIS depth range resource Class
Ocean Genome Resource- genomic DNA available Phylum
Anage Data Phylum
Reid et al, 2012 Phylum
Invertebrates of the Salish Sea Phylum
SERPENT resource Phylum
SPIRE resource
  • Cnidaria
SeaBase Phylum
Sloan-CoML NameLink Project
  • Cnidaria
Smithsonian type specimen data Phylum
Monthly ARKive text import Phylum
IUCN Structured Data Phylum
Vimeo resource Phylum
World Register of Marine Species (WoRMS)
view in classification
Wikimedia Commons
Wikimedia Commons Phylum
Wikimedia Commons
Wikipedia Phylum
iNaturalist Images Phylum
polytraits Phylum


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!