Class Hydrozoa: Hydra spp.

Hydra nerve net

Class Hydrozoa: Goniognemus

  
Class Hydrozoa: Physalia gas bag and tentacles (left and middle). Welts from a man-of-war (right)

Class Scyphozoa: Aurelia

Class Anthozoa: Anemonaes

Class Anthozoa: Corals

  
Class Anthozoa: Fossil Corals

Class Anthozoa: Clown fish bathing in an anemonae

Class Cubomedusae (left); welts on right.