United Kingdom Exclusive Economic Zone for Abylopsis tetragona (Otto, 1823) 
United Kingdom Exclusive Economic Zone for Adacna laeviuscula (Eichwald, 1829)  (inaccurate)
United Kingdom Exclusive Economic Zone for Adacna vitrea (Eichwald, 1829)  (inaccurate)
United Kingdom Exclusive Economic Zone for Albionella globosa (Leigh-Sharpe, 1918) 
United Kingdom Exclusive Economic Zone for Alella pagelli (Krøyer, 1863) 
United Kingdom Exclusive Economic Zone for Amphicaryon acaule Chun, 1888 
United Kingdom Exclusive Economic Zone for Anchistrotos onosi (Scott T., 1902) 
United Kingdom Exclusive Economic Zone for Anthosoma crassum (Abildgaard, 1794) 
United Kingdom Exclusive Economic Zone for Arachnactis albida Sars, 1846 
United Kingdom Exclusive Economic Zone for Arachnanthus sarsi Carlgren, 1912 
United Kingdom Exclusive Economic Zone for Bassia bassensis (Quoy & Gaimard, 1833) 
United Kingdom Exclusive Economic Zone for Bomolochus bellones Burmeister, 1835 
United Kingdom Exclusive Economic Zone for Bomolochus soleae Claus, 1864 
United Kingdom Exclusive Economic Zone for Caligus brevicaudatus Scott A., 1901 
United Kingdom Exclusive Economic Zone for Caligus curtus Müller O.F., 1785 
United Kingdom Exclusive Economic Zone for Caligus elongatus Nordmann, 1832 
United Kingdom Exclusive Economic Zone for Caligus minimus Otto, 1821 
United Kingdom Exclusive Economic Zone for Campanulina panicula G.O. Sars, 1874 
United Kingdom Exclusive Economic Zone for Ceratocymba sagittata (Quoy & Gaimard, 1827) 
United Kingdom Exclusive Economic Zone for Charopinus dubius Scott T., 1900 
United Kingdom Exclusive Economic Zone for Chelophyes appendiculata (Eschscholtz, 1829) 
United Kingdom Exclusive Economic Zone for Ciliatocardium ciliatum (O. Fabricius, 1780)  (inaccurate)
United Kingdom Exclusive Economic Zone for Clathrina primordialis (Haeckel, 1872)  (inaccurate)
United Kingdom Exclusive Economic Zone for Clausia lubbocki Claparède, 1863 
United Kingdom Exclusive Economic Zone for Clausia uniseta Bocquet & Stock, 1960 
United Kingdom Exclusive Economic Zone for Clavellisa emarginata (Krøyer, 1837) 
United Kingdom Exclusive Economic Zone for Clavellistes lampri (Scott T. & Scott A., 1913) 
United Kingdom Exclusive Economic Zone for Cronia konkanensis (Melvill, 1893)  (inaccurate)
United Kingdom Exclusive Economic Zone for Danielssenia typica Boeck, 1873 
United Kingdom Exclusive Economic Zone for Demoleus heptapus (Otto, 1821) 
United Kingdom Exclusive Economic Zone for Dentalium tomlini Melvill, 1918  (inaccurate)
United Kingdom Exclusive Economic Zone for Didacna baeri (Grimm, 1877)  (inaccurate)
United Kingdom Exclusive Economic Zone for Didacna parallela [sic]  (inaccurate)
United Kingdom Exclusive Economic Zone for Didacna trigonoides (Pallas, 1771)  (inaccurate)
United Kingdom Exclusive Economic Zone for Dimophyes arctica (Chun, 1897) 
United Kingdom Exclusive Economic Zone for Dinemoura producta (Müller O.F., 1785) 
United Kingdom Exclusive Economic Zone for Dreissena caspia Eichwald, 1855  (inaccurate)
United Kingdom Exclusive Economic Zone for Dreissena elata Andrusov, 1897  (inaccurate)
United Kingdom Exclusive Economic Zone for Dynamena pumila (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Echthrogaleus coleoptratus (Guérin-Méneville, 1837) 
United Kingdom Exclusive Economic Zone for Elpidia glacialis Théel, 1876  (inaccurate)
United Kingdom Exclusive Economic Zone for Enneagonum hyalinum Quoy & Gaimard, 1827 
United Kingdom Exclusive Economic Zone for Ephemera danica Müller, 1764 
United Kingdom Exclusive Economic Zone for Ericthonius brasiliensis (Dana, 1853)  (inaccurate)
United Kingdom Exclusive Economic Zone for Eulima patula Dall & C. T. Simpson, 1901  (doubtful)
United Kingdom Exclusive Economic Zone for Ficopomatus enigmaticus (Fauvel, 1923) 
United Kingdom Exclusive Economic Zone for Gammaracanthus loricatus (Sabine, 1824)  (inaccurate)
United Kingdom Exclusive Economic Zone for Haemobaphes ambiguus Scott T., 1900 
United Kingdom Exclusive Economic Zone for Haemobaphes cyclopterina (Müller O.F., 1776) 
United Kingdom Exclusive Economic Zone for Halopteris catharina (Johnston, 1833) 
United Kingdom Exclusive Economic Zone for Hatschekia labracis (Beneden, 1871) 
United Kingdom Exclusive Economic Zone for Hemicervinia stylifera (Thompson I.C., 1893) 
United Kingdom Exclusive Economic Zone for Heteromysis (Heteromysis) formosa S. I. Smith, 1874  (inaccurate)
United Kingdom Exclusive Economic Zone for Hydroides elegans (Haswell, 1883) [nomen protectum] 
United Kingdom Exclusive Economic Zone for Lepechinella arctica Schellenberg, 1926 
United Kingdom Exclusive Economic Zone for Lepeophtheirus hippoglossi (Krøyer, 1837) 
United Kingdom Exclusive Economic Zone for Lepeophtheirus pectoralis (Müller O.F., 1776) 
United Kingdom Exclusive Economic Zone for Lernaeocera branchialis (Linnaeus, 1767) 
United Kingdom Exclusive Economic Zone for Lernaeocera lusci (Bassett-Smith, 1896) 
United Kingdom Exclusive Economic Zone for Lithodes maja (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Luetkenia asterodermi Claus, 1864 
United Kingdom Exclusive Economic Zone for Megacalanus longicornis (Sars G.O., 1905) 
United Kingdom Exclusive Economic Zone for Megaclausia mirabilis O'Reilly, 1995 
United Kingdom Exclusive Economic Zone for Mesothuria (Penichrothuria) verrilli (Théel, 1886)  (inaccurate)
United Kingdom Exclusive Economic Zone for Mimocalanus cultrifer Farran, 1908 
United Kingdom Exclusive Economic Zone for Monodacna albida (Logvinenko & Starobogatov, 1967)  (inaccurate)
United Kingdom Exclusive Economic Zone for Monodacna caspia (Eichwald, 1829)  (inaccurate)
United Kingdom Exclusive Economic Zone for Monodacna colorata (Eichwald, 1829)  (inaccurate)
United Kingdom Exclusive Economic Zone for Muggiaea atlantica Cunningham, 1892 
United Kingdom Exclusive Economic Zone for Muggiaea kochii (Will, 1844) 
United Kingdom Exclusive Economic Zone for Nanomia cara Agassiz, 1865 
United Kingdom Exclusive Economic Zone for Naricava dilatata Rolán & Rubio, 2002  (inaccurate)
United Kingdom Exclusive Economic Zone for Nebalia troncosoi Moreira, Cacabelos & Dominguez, 2003  (inaccurate)
United Kingdom Exclusive Economic Zone for Nectopyramis thetis Bigelow, 1911 
United Kingdom Exclusive Economic Zone for Neobrachiella impudica (Nordmann, 1832) 
United Kingdom Exclusive Economic Zone for Neobrachiella insidiosa (Heller, 1865) 
United Kingdom Exclusive Economic Zone for Neobrachiella triglae (Claus, 1860) 
United Kingdom Exclusive Economic Zone for Nicothoe astaci Audouin & Edwards, 1826 
United Kingdom Exclusive Economic Zone for Nucellicola holmanae Lamb, Boxshall, Mill & Grahame, 1996 
United Kingdom Exclusive Economic Zone for Oithona similis Claus, 1866 
United Kingdom Exclusive Economic Zone for Ophiomyxa pentagona (Lamarck, 1816) 
United Kingdom Exclusive Economic Zone for Orthagoriscicola muricata (Krøyer, 1837) 
United Kingdom Exclusive Economic Zone for Pachypygus gibber (Thorell, 1859) 
United Kingdom Exclusive Economic Zone for Paludinella littorina (Delle Chiaje, 1828)  (inaccurate)
United Kingdom Exclusive Economic Zone for Pandarus bicolor Leach, 1816 
United Kingdom Exclusive Economic Zone for Parastephos pallidus Sars G.O., 1902 
United Kingdom Exclusive Economic Zone for Parvamussium siebenrocki (Sturany, 1899)  (inaccurate)
United Kingdom Exclusive Economic Zone for Parvicardium scriptum (Bucquoy, Dautzenberg & Dollfus, 1892)  (doubtful)
United Kingdom Exclusive Economic Zone for Philichthys xiphiae Steenstrup, 1862 
United Kingdom Exclusive Economic Zone for Philorthragoriscus serratus (Krøyer, 1863) 
United Kingdom Exclusive Economic Zone for Phyllothyreus cornutus (Milne Edwards, 1840) 
United Kingdom Exclusive Economic Zone for Physophora hydrostatica Forsskål, 1775 
United Kingdom Exclusive Economic Zone for Plumularia setacea (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Praya dubia (Quoy & Gaimard, 1833) 
United Kingdom Exclusive Economic Zone for Rhaphidostyla incisa (Schmidt, 1880)  (inaccurate)
United Kingdom Exclusive Economic Zone for Ritteriella picteti (Apstein, 1904)  (inaccurate)
United Kingdom Exclusive Economic Zone for Salmincola salmoneus (Linnaeus, 1758) 
United Kingdom Exclusive Economic Zone for Sanguinothus pinnarum de Silva & Burdon-Jones, 1961 
United Kingdom Exclusive Economic Zone for Schistobrachia ramosa (Krøyer, 1863) 
United Kingdom Exclusive Economic Zone for Sigecheres brittae Bresciani, 1964