CnidariaSea AnemonesHydrozoaInvertebratesHydraCtenophoraPlatyhelminthsPlacozoaPhylogenyNematocystPoriferaCnidarian VenomsEvolution, MolecularGeologyBiological EvolutionFossilsScyphozoaGenes, HomeoboxBody PatterningChordata, NonvertebrateAnthozoaPaleontologyDinoflagellidaVertebratesCubozoaMyxozoaGene Expression Regulation, DevelopmentalEmbryo, NonmammalianGene DuplicationMolecular Sequence DataSymbiosisHomeodomain ProteinsMultigene FamilyGenomeAmino Acid SequenceLife Cycle StagesBites and StingsMetamorphosis, BiologicalAnnelidaMorpholinosGastrulationOpsinsAnimal StructuresSequence AlignmentEukaryotaInteinsIn Situ HybridizationGenome, MitochondrialExpressed Sequence TagsLarvaSequence Homology, Amino AcidConserved SequenceEndodermBase SequenceGenomicsRNA, Ribosomal, 18S