Keywords: Abludomelita obtusata; Abludomelita obtusata, standard deviation; Actiniaria; Actiniaria, standard deviation; Atylus swammerdamei; Atylus swammerdamei, standard deviation; Bathyporeia elegans; Bathyporeia elegans, standard deviation; Bathyporeia guilliamsoniana; Bathyporeia guilliamsoniana, standard deviation; Chaetozone cf. setosa; Chaetozone cf. setosa, standard deviation; Corystes cassivelaunus; Corystes cassivelaunus, standard deviation; Counting; DEPTH, sediment/rock; Distance; Echinocardium cordatum; Echinocardium cordatum, standard deviation; Eteone longa; Eteone longa, standard deviation; Eumida sanguinea; Eumida sanguinea, standard deviation; Eunereis longissima; Eunereis longissima, standard deviation; FINO1; Goniada maculata; Goniada maculata, standard deviation; Harmothoe glabra; Harmothoe glabra, standard deviation; Iphinoe trispinosa; Iphinoe trispinosa, standard deviation; Lanice conchilega; Lanice conchilega, standard deviation; Leucothoe incisa; Leucothoe incisa, standard deviation; Magelona filiformis; Magelona filiformis, standard deviation; Magelona johnstoni; Magelona johnstoni, standard deviation; Maximum; Minimum; Monitoring station; MONS; Montacuta ferruginosa; Montacuta ferruginosa, standard deviation; Mysella bidentata; Mysella bidentata, standard deviation; Nemertea; Nemertini, standard deviation; Nephtys cirrosa; Nephtys cirrosa, standard deviation; North Sea; Notomastus latericeus; Notomastus latericeus, standard deviation; Orchomene nana; Orchomene nana, standard deviation; Owenia fusiformis; Owenia fusiformis, standard deviation; Pagurus bernhardus; Pagurus bernhardus, standard deviation; Pectinaria koreni; Pectinaria koreni, standard deviation; Phaxas pellucidus; Phaxas pellucidus, standard deviation; Phoronis spp.; Phoronis spp., standard deviation; Phyllodoce lineata; Phyllodoce lineata, standard deviation; Phyllodoce rosea; Phyllodoce rosea, standard deviation; Poecilochaetus serpens; Poecilochaetus serpens, standard deviation; Polydora pulchra; Polydora pulchra, standard deviation; Pontocrates arenarius; Pontocrates arenarius, standard deviation; Portunidae; Portunidae, standard deviation; Processa modica; Processa modica, standard deviation; Protodorvillea kefersteini; Protodorvillea kefersteini, standard deviation; Scolelepis bonnieri; Scolelepis bonnieri, standard deviation; Spiophanes bombyx; Spiophanes bombyx, standard deviation; Spio spp.; Spio spp., standard deviation; Tellina fabula; Tellina fabula, standard deviation; Thracia papyracea; Thracia papyracea, standard deviation; Urothoe poseidonis; Urothoe poseidonis, standard deviation