Hydrozoa
E90934
Hydrozoa is a diverse class of mostly marine cnidarians that includes hydras, many colonial and medusa-forming species, and some bioluminescent organisms.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Hydrozoa canonical | 5 |
| Hydroidolina | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T745052 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Hydrozoa Context triple: [Cnidaria, includesClass, Hydrozoa]
-
A.
Scyphozoa
Scyphozoa is a class of predominantly marine jellyfish known for their conspicuous medusa stage and gelatinous, bell-shaped bodies.
-
B.
Cnidaria
Cnidaria is a phylum of mostly marine animals, including jellyfish, corals, sea anemones, and hydras, characterized by radial symmetry and specialized stinging cells called cnidocytes.
-
C.
Anthozoa
Anthozoa is a class of marine invertebrates within the phylum Cnidaria that includes corals, sea anemones, and related polyp-only forms.
-
D.
Thaliacea
Thaliacea is a class of free-floating, barrel-shaped marine tunicates that form part of the plankton and often live in colonies.
-
E.
Platyhelminthes
Platyhelminthes is a phylum of simple, soft-bodied, bilaterally symmetrical invertebrates commonly known as flatworms, which includes both free-living and parasitic species.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Hydrozoa Target entity description: Hydrozoa is a diverse class of mostly marine cnidarians that includes hydras, many colonial and medusa-forming species, and some bioluminescent organisms.
-
A.
Scyphozoa
Scyphozoa is a class of predominantly marine jellyfish known for their conspicuous medusa stage and gelatinous, bell-shaped bodies.
-
B.
Cnidaria
Cnidaria is a phylum of mostly marine animals, including jellyfish, corals, sea anemones, and hydras, characterized by radial symmetry and specialized stinging cells called cnidocytes.
-
C.
Anthozoa
Anthozoa is a class of marine invertebrates within the phylum Cnidaria that includes corals, sea anemones, and related polyp-only forms.
-
D.
Thaliacea
Thaliacea is a class of free-floating, barrel-shaped marine tunicates that form part of the plankton and often live in colonies.
-
E.
Platyhelminthes
Platyhelminthes is a phylum of simple, soft-bodied, bilaterally symmetrical invertebrates commonly known as flatworms, which includes both free-living and parasitic species.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
class
ⓘ
cnidarian ⓘ taxon ⓘ |
| bodyPlan | diploblastic ⓘ |
| characteristicFeature |
cnidocytes
ⓘ
nematocysts ⓘ |
| commonName | hydrozoans ⓘ |
| describedByTaxonAuthor | Gaston de Lacaze-Duthiers ⓘ |
| describedInYear | 1853 ⓘ |
| distribution | worldwide oceans ⓘ |
| ecologicalRole |
benthic predator
ⓘ
planktonic predator ⓘ |
| etymology | from Greek "hydro" meaning water and "zoon" meaning animal ⓘ |
| feedingType | carnivorous ⓘ |
| greenFluorescentProteinSource | Aequorea victoria ⓘ |
| hasBodyCavity | gastrovascular cavity ⓘ |
| hasLifeStage |
medusa
ⓘ
polyp ⓘ |
| hasMember |
Aequorea victoria
ⓘ
Anthoathecata ⓘ Hydra ⓘ Hydractinia echinata ⓘ Hydroidolina ⓘ
linked to:
Hydrozoa
Leptothecata ⓘ Obelia ⓘ Physalia physalis ⓘ Siphonophorae ⓘ Trachylinae ⓘ Turritopsis dohrnii ⓘ Velella velella ⓘ |
| hasTissueLayer |
ectoderm
ⓘ
endoderm ⓘ |
| includes |
bioluminescent organisms
ⓘ
colonial species ⓘ hydras ⓘ medusa-forming species ⓘ |
| kingdom | Animalia ⓘ |
| languageOfName | Greek ⓘ |
| locomotion |
jet propulsion in medusae
ⓘ
passive drifting ⓘ |
| notableFor |
alternation of generations
ⓘ
bioluminescence ⓘ complex colonial organization ⓘ |
| phylum | Cnidaria ⓘ |
| reproductionType |
asexual reproduction
ⓘ
sexual reproduction ⓘ |
| subphylum | Medusozoa ⓘ |
| symmetry | radial symmetry ⓘ |
| taxonRank | class ⓘ |
| typicalHabitat |
freshwater
ⓘ
marine environment ⓘ |
| uses |
model organisms in developmental biology
ⓘ
source of green fluorescent protein ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Hydrozoa Description of subject: Hydrozoa is a diverse class of mostly marine cnidarians that includes hydras, many colonial and medusa-forming species, and some bioluminescent organisms.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Hydrozoa