#hydroidolina

Giant bell jelly (Scrippsia pacifica)

Ringed tubularia (Ectopleura larynx)

Snowdrop Hydroid (Gattya humilis)

...a delicate species of colonial Halopterdid hydroid which is endemic to an area off the south African coast, ranging from Northern Namibia to KwaZulu-Natal. Snowdrop hydroids typically occur from the littoral zone to ~70 m (230 ft) under water, where they are usually found growing on coralline algae or weed. 

Classification

Animalia-Cnidaria-Hydrozoa-Hydroidolina-Leptothecata-Plumularoioidea-Halopterididae-Gattya-G. humilis

Noble 'Coral' (Stylaster nobilis) 

...a species of colonial Stylasterid hydroid which is endemic to the South African coast from the Atlantic Coast of the Cape Peninsula to Port Elizabeth. Like the unrelated hard corals, noble corals colonies are predatory ans will feed on a variety of plankton which are dispatched by stinging nematocytes.

Classification

Animalia-Cnidaria-Hydrozoa-Hydroidolina-Anthoathecata-Filifera-Stylasteridae-Stylaster-S. nobilis