Kingdom
Animalia
Phylum
Cnidaria
Class
Hydrozoa
Distinguishing features
Distinguishing features still need to be specified.
Size
- Size data has not been obtained.
Synonyms
Behaviour
From Wikipedia, Hydroids are a life stage for most animals of class Hydrozoa, small predators related to jellyfish.
Web resources
Danger
- mild discomfort - Some Hydroids have stinger cells.