InvertebratesVertebratesMolecular Sequence DataChordata, NonvertebrateZebrafishAmino Acid SequenceEvolution, MolecularBiological EvolutionUrochordataGene Expression Regulation, DevelopmentalEmbryo, NonmammalianFishesCiona intestinalisMolluscaSequence Homology, Amino AcidEchinodermataBase SequenceSpecies SpecificityChordataSequence AlignmentZebrafish ProteinsBody PatterningCrustaceaLampreysDrosophila ProteinsDrosophilaHagfishesArthropodsConserved SequenceDrosophila melanogasterLarvaAquatic OrganismsPolychaetaAnnelidaReptilesCnidariaIn Situ HybridizationBivalviaPhotoreceptor Cells, InvertebrateInsectsCloning, MolecularAmphibiansGene DuplicationCaenorhabditis elegansPhylogenyGenomeMammalsAnimals, Genetically ModifiedXenopus ProteinsGanglia, InvertebrateDNA, ComplementaryXenopusHomeodomain ProteinsGastropodaHemocytesTakifuguSharksChickensEcosystemLymnaeaModels, BiologicalSignal TransductionGenes, HomeoboxTranscription FactorsMarine BiologySea CucumbersBirdsFood ChainXenopus laevisInvertebrate HormonesLizardsInsect ProteinsMorphogenesisSequence Analysis, DNABrachyuraNervous SystemPoriferaAmphipodaOligochaetaOryziasSyntenyChick EmbryoPetromyzonFish ProteinsCephalopodaMutationBiodiversityCaenorhabditis elegans ProteinsTetraodontiformesSnailsDaphniaAstacoideaProtein Structure, TertiaryFossilsNerve Tissue ProteinsMytilusPhotoreceptor Cells, VertebrateBryozoaLeechesSea Urchins