Home›Cnidarians›Hydrozoans (Hydrozoa)›All Hydrozoans (Hydrozoa)Browse ByAll Hydrozoans (Hydrozoa)Hydrozoans (Hydrozoa) is a Browse By group of the Nature Atlas that gathers the hydrozoans, including siphonophores, hydras, hydroids and small hydromedusae. An entry belongs here when its own cited article states that it is a hydrozoan or hydromedusa. It excludes true jellyfish, box jellyfish and corals. Members are placed by the classification their cited article gives, not by common name or appearance alone.All Hydrozoans (Hydrozoa)SourcesComments (0)Reader Challenges (0)All Hydrozoans (Hydrozoa)Filter Results8 entriesCommon GroupAllHydrozoans (Hydrozoa) (8)TaxonomyAllHydrozoa (8)HabitatAllMarine (4)Open Ocean (1)Conservation StatusAllNot Evaluated (5)EcosystemAllSargasso Sea (2)Everyday GroupAllHydrozoans (Hydrozoa) (8)DietAllCarnivore (5)Filter Feeder (1)System (Realm)AllMarine (6)Marine and Freshwater (1)Relationship to PeopleAllVenomous or Dangerous to Humans (2)Living or ExtinctAllYes (3)Where It LivesAllAlgeria (2)Asia (1)Australia (2)Belgium (3)Brazil (2)Canada (4)Chile (1)Colombia (2)Denmark (1)France (4)Ireland (1)Italy (2)Japan (4)Kenya (2)Lebanon (1)Malta (2)Netherlands (1)New Zealand (3)North America (1)Norway (3)Panama (1)Portugal (2)South Africa (1)South America (1)Sweden (1)The Atlantic Ocean (1)The Indian Ocean (1)The Pacific Ocean (1)United Kingdom (3)United States (2)Vietnam (2)Show ResultsBrowseCompareSelect all 8Aequorea victoriaCnidariansFire CoralCnidariansFreshwater JellyfishCnidariansHydraCnidariansImmortal JellyfishCnidariansObelia GeniculataCnidariansPortuguese Man o WarCnidariansPortuguese Man-of-WarCnidariansSourcesPortuguese Man-of-War (Wikipedia)tier 3WikipediaHas Member: Portuguese Man o War, LeadThe Portuguese man o' war (Physalia physalis), also known as the man-of-war, bluebottle, or sometimes called Caravela Portuguesa (a name of Portuguese origin), is a marine hydrozoan found in the Atlantic, Indian, and Pacific oceans.Has Member: Portuguese Man-of-War, LeadThe Portuguese man o' war (Physalia physalis), also known as the man-of-war, bluebottle, or sometimes called Caravela Portuguesa (a name of Portuguese origin), is a marine hydrozoan found in the Atlantic, Indian, and Pacific oceans.View the SourceWikipedia: Obelia geniculatatier 2WikipediaHas Member: Obelia Geniculata, LeadQuote, Has Member: Obelia Geniculata, LeadObelia geniculata is a species of cnidarian belonging to the family Campanulariidae.View the SourceWikipedia: Fire coraltier 2WikipediaHas Member: Fire Coral, LeadQuote, Has Member: Fire Coral, LeadFire corals (Millepora) are a genus of colonial marine organisms that exhibit physical characteristics similar to that of stony coral.View the SourceWikipedia: Turritopsis dohrniitier 2WikipediaHas Member: Immortal Jellyfish, LeadQuote, Has Member: Immortal Jellyfish, LeadTurritopsis dohrnii, commonly known as the immortal jellyfish, is a species of small, biologically immortal Medusozoa (jellyfish) found worldwide in temperate to tropic waters.View the SourceWikipedia: Olindiidaetier 2WikipediaHas Member: Freshwater Jellyfish, LeadQuote, Has Member: Freshwater Jellyfish, LeadOlindiidae is a family of hydrozoans in the order Limnomedusae.View the SourceAequorea victoria (Wikipedia)Has Member: Aequorea victoria, LeadQuote, Has Member: Aequorea victoria, LeadAequorea victoria, also sometimes called the crystal jelly, is a bioluminescent hydrozoan jellyfish, or hydromedusa, that is found off the west coast of North America.View the SourceHydra (genus) (Wikipedia)Has Member: Hydra, Lead, groupQuote, Has Member: Hydra, Lead, groupis a genus of small freshwater hydrozoans in the phylum CnidariaView the SourceComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.