You can search the complete taxonomic tree of the species in the database. Click "Phylum" to get back to to the starting point. The thumbnails show examples of the Class, Order etc.

Phylum	Class	Order	Family	Species
Cnidaria	Anthozoa	Scleractinia
Cnidaria	Anthozoa	Alcyonacea
Cnidaria	Anthozoa	Corallimorpharia
Cnidaria	Anthozoa	Actiniaria
Cnidaria	Anthozoa	Antipatharia
Cnidaria	Anthozoa	Ceriantharia
Cnidaria	Anthozoa	Zoantharia
Cnidaria	Anthozoa	Gorgonacea
Cnidaria	Anthozoa	Zoanthidea