Is every Hydrozoa on Earth here?

No. Only photographed species-rank animals with a CR, EN, or EW category on Wikidata.

Where does class come from?

A GBIF match on the scientific name.

Hydrozoa in crisis

7 records

Photograph of Millepora complanata (Millepora complanata). GBIF class Hydrozoa

7 animals on this catalog match GBIF class Hydrozoa. Each page is a photograph and an original dossier, not a copied assessment.

Class is a filing shelf. It does not make one crisis kinder than another. Search the catalog for Hydrozoa or open a record below. The stats page shows how this shelf sits against the rest of the 3,318.

Millepora complanata

Millepora nitida

Millepora squarrosa

Millepora alcicornis

Millepora platyphylla

Millepora tenera

Net fire coral

Millepora dichotoma

Quick answers

Is every Hydrozoa on Earth here?: No. Only photographed species-rank animals with a CR, EN, or EW category on Wikidata.
Where does class come from?: A GBIF match on the scientific name.