Click the links to browse through the WoRMS marine species taxonomy.
Animalia
  Mollusca
  Porifera
  Platyhelminthes
  Nematoda
  Annelida
  Nemertina
  Arthropoda
    Crustacea
      Remipedia
      Branchiopoda
      Maxillopoda
        Mystacocarida
        Copepoda
          Progymnoplea
          Neocopepoda
            Gymnoplea
            Podoplea
              Cyclopoida
              Harpacticoida
                Adenopleurellidae
                Aegisthidae
                Ambunguipedidae
                Ameiridae
                Ancorabolidae
                Arenopontiidae
                Argestidae
                Balaenophilidae
                Canthocamptidae
                Canuellidae
                Cerviniidae
                Cletodidae
                Cletopsyllidae
                Clytemnestridae
                Cristacoxidae
                Cylindropsyllidae
                Danielsseniidae
                Darcythompsoniidae
                Diosaccidae
                Ectinosomatidae
                Euterpinidae
                Harpacticidae
                Huntemanniidae
                Laophontidae
                Laophontopsidae
                Latiremidae
                Leptastacidae
                Leptopontiidae
                Longipediidae
                Louriniidae
                Metidae
                Miraciidae
                  Amphiascopsis
                  Schizoperopsis
                  Teissierella
                  Miscegenus
                  Microthalestris
                  Mesamphiascus
                  Diosaccinae
                    Amonardia
                    Amphiascoides
                    Amphiascus
                    Bulbamphiascus
                    Dactylopodamphiascopsis
                    Diosaccopsis
                    Diosaccus
                    Eoschizopera
                    Haloschizopera
                    Ialysus
                    Metamphiascopsis
                    Paramphiascella
                    Paramphiascopsis
                    Pararobertsonia
                    Protopsammotopa
                    Psammotopa
                    Pseudamphiascopsis
                    Pseudodiosaccopsis
                    Pseudodiosaccus
                    Rhyncholagena
                    Robertgurneya
                    Robertsonia
                    Schizopera
                        Schizopera (Neoschizopera)
                        Schizopera (Schizopera)
                        Schizopera elatensis
                        Schizopera aegyptica
                        Schizopera anomala
                        Schizopera aralensis
                        Schizopera arconae
                        Schizopera baltica
                        Schizopera californica
                        Schizopera carolinensis
                        Schizopera chiloensis
                        Schizopera cicolanii
                        Schizopera consimilis
                        Schizopera crassispinata
                        Schizopera dimentmani
                        Schizopera fimbriata
                        Schizopera giselae
                        Schizopera gligici
                        Schizopera haitiana
                        Schizopera inopinata
                        Schizopera inornata
                        Schizopera issykkulica
                        Schizopera knabeni
                        Schizopera kunzi
                        Schizopera lacusamari
                        Schizopera lagrecai
                        Schizopera lindae
                        Schizopera longicauda
                        Schizopera marlieri
                        Schizopera minuticornis
                        Schizopera monardi
                        Schizopera neglecta
                        Schizopera noodti
                        Schizopera ornata
                        Schizopera parvula
                        Schizopera petkovskii
                        Schizopera pori
                        Schizopera pratensis
                        Schizopera pseudojugurtha
                        Schizopera reducta
                        Schizopera rotundipes
                        Schizopera sclaris
                        Schizopera soyeri
                        Schizopera spinifer
                        Schizopera spinulosa
                        Schizopera stephanidesi
                        Schizopera syltensis
                        Schizopera taricheana
                        Schizopera tobae
                        Schizopera triacantha
                        Schizopera ungulata
                        Schizopera validior
                        Schizopera variseta
                        Schizopera varnensis
                        Schizopera vicina
                        Schizopera longirostris
                        Schizopera clandestina
                        Schizopera akatovae
                        Schizopera arenicola
                        Schizopera bozici
                        Schizopera bradyi
                        Schizopera bursinae
                        Schizopera chaetosa
                        Schizopera compacta
                        Schizopera gauldi
                        Schizopera grimalschii
                        Schizopera indica
                        Schizopera jugurtha
                        Schizopera langi
                        Schizopera longifurcata
                        Schizopera meridionalis
                        Schizopera minuta
                        Schizopera nana
                        Schizopera nichollsi
                        Schizopera paradoxa
                        Schizopera pontica
                        Schizopera subterranea
                        Schizopera osana
                        Schizopera hawaiiensis
                        Schizopera nicoyana
                        Schizopera major
                        Schizopera propinqua
                        Schizopera ciliata
                        Schizopera pusilla
                        Schizopera uramurdahi
                        Schizopera oldcuei
                        Schizopera jundeei
                        Schizopera depotspringsi
                        Schizopera costaricana
                        Schizopera austindownsi
                        Schizopera rybnikovi
                        Schizopera roberiverensis
                        Schizopera weelumurra
                        Schizopera setulosa
                        Schizopera spinulosa
                    Typhlamphiascus
                    Antiboreodiosaccus
                    Parialysus
                    Pholenota
                    Actopsyllus
                    Schizoperoides
                    Balucopsylla
                    Helmutkunzia
                    Paramphiascoides
                    Goffinella
                    Neomiscegenus
                    Tydemanella
                  Amphiascella
                  Beatricella
                  Dactylamphiascopsis
                  Dwightia
                  Paradiosaccus
                  Protoleptastacus
                  Setella
                  Spio
                  Teisseriella
                  Varnaia
                  Sarsamphiascus
                  Monardius
                  Miraciinae
                  Stenheliinae
                Neobradyidae
                Normanellidae
                Novocriniidae
                Orthopsyllidae
                Paramesochridae
                Parastenheliidae
                Parastenocarididae
                Peltidiidae
                Phyllognathopodidae
                Porcellidiidae
                Psammopsyllidae
                Rhizothricidae
                Rotundiclipeidae
                Superornatiremidae
                Tachidiidae
                Tegastidae
                Tetragonicepsidae
                Thalestridae
                Thompsonulidae
                Tisbidae
                Zosimeidae
                Paranannopidae
                Ectinosomidae
                Pseudopeltidiidae
                Pteropsyllidae
                Rhynchothalestridae
                Pseudotachidiidae
                Idyanthidae
                Dactylopusiidae
                Ismardiidae
                Metahuntemanniidae
                Heteropsyllidae
                Parameiropsidae
                Nannopodidae
                Idyaeidae
              Poecilostomatoida
              Siphonostomatoida
              Monstrilloida
              Misophrioida
              Mormonilloida
          Thaumatopsylloida
        Branchiura
        Tantulocarida
        Thecostraca
        Pentastomida
      Malacostraca
      Ostracoda
      Pentastomata
    Chelicerata
    Myriapoda
    Hexapoda
  Ctenophora
  Cnidaria
  Sipuncula
  Echiura
  Pogonophora
  Entoprocta
  Tardigrada
  Phoronida
  Brachiopoda
  Echinodermata
  Hemichordata
  Chordata
  Gastrotricha
  Chaetognatha
  Ectoprocta
  Mesozoa
  Rotifera
  Gnathostomulida
  Acanthocephala
  Cycliophora
  Cephalorhyncha
  Placozoa
  Bryozoa
  Myxozoa
  Sipunculida
  Pentastomida
  Nemertini
Plantae
Fungi
Protozoa
Bacteria
Chromista
Archaea
Viruses
Monera