LampreysFisheriesPetromyzonFishesConservation of Natural ResourcesOceans and SeasEcosystemGadus morhuaHagfishesPopulation DynamicsNorth SeaMarine BiologyFood ChainBiomassAtlantic OceanPerciformesAquaculturePacific OceanBiodiversityTunaPhysiology, ComparativeIndian OceanSharksMediterranean SeaCoral ReefsRiversSwimmingAnimal MigrationSpinal CordVertebratesEcologyOceanographyReticular FormationFood SupplyGeographyGadiformesShellfishPopulation DensityAnimal DistributionEuphausiaceaSaint LuciaAquatic OrganismsPalinuridaeBaysPyrrolidonecarboxylic AcidLocomotionShipsHistory, 17th CenturySeafoodChordata, NonvertebratePhocoenaBaltic StatesLarvaPhylogenySkates (Fish)SalmonPredatory Behavior