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
Porifera	Demospongiae	Haplosclerida	Niphatidae	Cribrochalina vasculum
Porifera	Demospongiae	Haplosclerida	Niphatidae	Niphates digitalis