CnidariaHydrozoaSea AnemonesHydraScyphozoaCubozoaAnemoneAnthozoaNematocystCtenophoraPhylogenyPlacozoaEvolution, MolecularInvertebratesCnidarian VenomsPoriferaMolecular Sequence DataRNA, Ribosomal, 28SRNA, Ribosomal, 18SDNA, RibosomalAmino Acid SequenceBody PatterningHistocompatibility Antigens Class IMetamorphosis, BiologicalGenes, HomeoboxSequence AlignmentHistocompatibility Antigens Class IIDNA, MitochondrialBiological EvolutionSequence Homology, Amino AcidSpecies Specificity