InvertebratesPhysiological ProcessesPhylogenyMolecular Sequence DataEcosystemEvolution, MolecularDrosophila melanogasterSpecies SpecificityAmino Acid SequenceBase SequenceVertebratesMolluscaEchinodermataAquatic OrganismsCrustaceaUrochordataChordata, NonvertebrateArthropodsBivalviaPolychaetaBiological EvolutionAnnelidaCnidariaInsectsGastropodaCiona intestinalisPhotoreceptor Cells, InvertebrateMarine BiologyGanglia, InvertebrateBiodiversityFood ChainLarvaAmphipodaSea CucumbersOligochaetaLymnaeaSequence Homology, Amino AcidHemocytesCaenorhabditis elegansFishesInvertebrate HormonesSequence AlignmentDrosophilaPoriferaChordataBryozoaDrosophila ProteinsSnailsCephalopodaSequence Analysis, DNABrachyuraOceans and SeasMytilusPopulation DynamicsDaphniaRotiferaAnthozoaIntroduced SpeciesAstacoideaHorseshoe CrabsThoracicaLeechesBeetlesBeesOctopamineNephropidaeSeawaterCloning, MolecularMammals