What class does Air fern belong to?

jellyfish, free-swimming members of the phylum Cnidaria

Hydrozoa (hydrozoans), the taxonomic class of very small, predatory animals which can be solitary or colonial and which mostly live in saltwater

Leptolinae, a cnidarian subclass of the Hydrozoa

animal (multicellular, interactive, eukaryotic lifeform capable of locomotion)

property (something owned; any tangible or intangible possession that is owned by someone)

Neomura, a clade composed of the two domains of life of Archaea and Eukaryota

Hydroida, an obsolete cnidarian order which united such animals as hydras, hydromedusae, and many marine attached hydroids

Leptomedusae or Leptomedusa, commonly called thecate hydroids, a cnidarian order in the subclass Leptolinae

Eumetazoa, a clade comprising all major animal groups except sponges, placozoa, and several other obscure or extinct life forms, such as Dickinsonia

Conica, a cnidarian suborder of the Leptomedusae

Cnidarians, a for a long time grouped with Ctenophores in the phylum Coelenterata, but increasing awareness of their differences caused them to be placed in separate phyla

eukaryote, an organism composed of one or more cells containing a visible nucleaus and organells

organism (any single or multi-celled living thing, not a virus)

object with a mass (an object where it makes sense to talk about its weight)

object with a length or height (an object that can be described as short in some sense)

animal or plant (anything which can be described as plant or animal life)

product (a saleable commodity)

visible object (something which reflects or emits light)

object with a height (an object where it makes sense to talk about its height)

object which does not exist forever

entity (any object at all, conceptual or physical)

entity that is capable of deliberate action (such as a person, an animal or an organization)

intelligence possessing entity (something that has some kind of intelligent skills)

individual object (object which is an individual thing - not a class, relation or attribute)

natural object (an object occurring naturally; not made by man)

biological object

physical object classified by property (such as one that belongs in the class of objects with a mass)

animal (excluding human beings)