Porifera
Sponges
Made up of an aggregation of cells
Lacks tissues and organs
Monoblastic
Cnidaria
Sea jellies, sea anemones, coral, hydra Contains tissues and lacks organs Medusa and polyp Stinging cells cnidocytes Diploblastic
Ctenophora
Comb jellies
Contains tissues and lacks organs
Class Anthozoa
Sea anemones and sea pens