Keywords: Abra prismatica; Abra prismatica, standard deviation; Acidostoma obesum; Acidostoma obesum, standard deviation; Acrocnida brachiata; Acrocnida brachiata, standard deviation; Ammodytidae; Ammodytidae, standard deviation; Amphilochus neapolitanus; Amphilochus neapolitanus, standard deviation; Apherusa clevei; Apherusa clevei, standard deviation; Apherusa ovalipes; Apherusa ovalipes, standard deviation; Aricidea cerrutii; Aricidea cerrutii, standard deviation; Ascidiacea; Ascidiacea, standard deviation; Asterias rubens; Asterias rubens, standard deviation; Atelecyclus; Atelecyclus, standard deviation; Branchiostoma lanceolatum; Branchiostoma lanceolatum, standard deviation; Callianassa subterranea; Callianassa subterranea, standard deviation; Cancer pagurus; Cancer pagurus, standard deviation; Chamelea gallina; Chamelea gallina, standard deviation; Cheirocratus sundevallii; Cheirocratus sundevallii, standard deviation; Clausinella fasciata; Clausinella fasciata, standard deviation; Corbula gibba; Corbula gibba, standard deviation; Corophium acherusicum; Corophium acherusicum, standard deviation; Corophium insidiosum; Corophium insidiosum, standard deviation; Corophium sextonae; Corophium sextonae, standard deviation; Corystes cassivelaunus; Corystes cassivelaunus, standard deviation; Counting; Cylichna cylindracea; Cylichna cylindracea, standard deviation; DEPTH, sediment/rock; Diastylis bradyi; Diastylis bradyi, standard deviation; Distance; Donax vittatus; Donax vittatus, standard deviation; Edwardsiidae; Edwardsiidae, standard deviation; Enipo kinbergi; Enipo kinbergi, standard deviation; Ensis directus; Ensis directus, standard deviation; Ensis ensis; Ensis ensis, standard deviation; Eteone flava; Eteone flava, standard deviation; Eteone foliosa; Eteone foliosa, standard deviation; Eteone longa; Eteone longa, standard deviation; Eteone picta; Eteone picta, standard deviation; Eulalia viridis; Eulalia viridis, standard deviation; Eumida sanguinea; Eumida sanguinea, standard deviation; Euspira pulchella; Euspira pulchella, standard deviation; FINO1; Galathea sp.; Galathea sp., standard deviation; Gari fervensis; Gari fervensis, standard deviation; Gattyana cirrosa; Gattyana cirrosa, standard deviation; Glycera alba; Glycera alba, standard deviation; Glycera lapidum; Glycera lapidum, standard deviation; Goniada maculata; Goniada maculata, standard deviation; Harmothoe glabra; Harmothoe glabra, standard deviation; Harmothoe impar; Harmothoe impar, standard deviation; Harmothoe ljungmani; Harmothoe ljungmani, standard deviation; Hippolyte varians; Hippolyte varians, standard deviation; Hippomedon denticulatus; Hippomedon denticulatus, standard deviation; Iphinoe trispinosa; Iphinoe trispinosa, standard deviation; Jassa spp.; Jassa spp., standard deviation; Lagisca extenuata; Lagisca extenuata, standard deviation; Leptocheirus pilosus; Leptocheirus pilosus, standard deviation; Leucothoe incisa; Leucothoe incisa, standard deviation; Lutraria spp.; Lutraria spp., standard deviation; Mactra stultorum; Mactra stultorum, standard deviation; Magelona alleni; Magelona alleni, standard deviation; Magelona mirabilis; Magelona mirabilis, standard deviation; Maximum; Microprotopus maculatus; Microprotopus maculatus, standard deviation; Minimum; Monitoring station; MONS; Mya arenaria; Mya arenaria, standard deviation; Mysella bidentata; Mysella bidentata, standard deviation; Mytilus edulis; Mytilus edulis, standard deviation; Nephtys assimilis; Nephtys assimilis, standard deviation; Nephtys caeca; Nephtys caeca, standard deviation; Nephtys hombergii; Nephtys hombergii, standard deviation; North Sea; Nucula nitidosa; Nucula nitidosa, standard deviation; Ophiodromus flexuosus; Ophiodromus flexuosus, standard deviation; Ophiura affinis; Ophiura affinis, standard deviation; Ophiura ophiura; Ophiura ophiura, standard deviation; Opisthobranchia; Opisthobranchia, standard deviation; Orchomene nana; Orchomene nana, standard deviation; Pagurus bernhardus; Pagurus bernhardus, standard deviation; Pandalina brevirostris; Pandalina brevirostris, standard deviation; Pariambus typicus; Pariambus typicus, standard deviation; Pectinaria koreni; Pectinaria koreni, standard deviation; Phaxas pellucidus; Phaxas pellucidus, standard deviation; Philocheras bispinosus; Philocheras bispinosus, standard deviation; Pholoe baltica; Pholoe baltica, standard deviation; Phyllodoce groenlandica; Phyllodoce groenlandica, standard deviation; Phyllodoce lineata; Phyllodoce lineata, standard deviation; Phyllodoce mucosa; Phyllodoce mucosa, standard deviation; Phyllodoce rosea; Phyllodoce rosea, standard deviation; Pisidia longicornis; Pisidia longicornis, standard deviation; Pisione remota; Pisione remota, standard deviation; Podarkeopsis helgolandica; Podarkeopsis helgolandica, standard deviation; Polydora guillei; Polydora guillei, standard deviation; Polydora pulchra; Polydora pulchra, standard deviation; Presence; Protodorvillea kefersteini; Protodorvillea kefersteini, standard deviation; Scalibregma inflatum; Scalibregma inflatum, standard deviation; Scolelepis bonnieri; Scolelepis bonnieri, standard deviation; Scolelepis foliosa; Scolelepis foliosa, standard deviation; Scolelepis squamata; Scolelepis squamata, standard deviation; Sigalion mathildae; Sigalion mathildae, standard deviation; Spisula elliptica; Spisula elliptica, standard deviation; Spisula subtruncata; Spisula subtruncata, standard deviation; Stenothoe marina; Stenothoe marina, standard deviation; Streptosyllis websteri; Streptosyllis websteri, standard deviation; Syllis hyalina; Syllis hyalina, standard deviation; Turbonilla lactea; Turbonilla lactea, standard deviation; Upogebia deltaura; Upogebia deltaura, standard deviation