Benthic isopods from this data set were collected during the IceAGE 3 expedition (SO276) on board RV Sonne in July 2020 with an epibenthic sledge (EBS). A total of seven EBS samples were taken in two areas of the Aegir ridge (Norwegian basin) at depths between 681 m to 3,702 m. The benthic samples taken are the first from the deep seabed within the Aegir ridge and therefore represent an important data set for assessing the diversity of the deep Nordic seas and their relationship to water mass distribution and depth. Isopoda collected by the EBS contained 1,978 specimens divided into eleven families, 25 genera and at least 42 species. Munnopsidae were by far the most dominant family contributing 59.1% to total isopod specimens, followed by the Munnidae (18.3) and Katianiridae (17.8). The remaining families were present with less than 5% of total Isopoda.

Benthic Haploniscidae (Iopoda) in this data set were collected during BIOICE (Benthic invertebrates of Icelandic waters), IceAGE (Icelandic marine Animals: Genetics and Ecology), IceAge 2 (Icelandic marine Animals: Genetics and Ecology 2), IceAGE RR (Icelandic marine Animals: Genetics and Ecology Reykjanes Ridge) and IceAge 3 (Icelandic marine Animals: Genetics and Ecology cruises 3) projects during 1992- 2020

This dataset contains Amphipod distribution records and is based on literature from the years 1931 to 2018. The data were collected during a variety of cruises and sampling events while the majority was obtained during the Danish Ingolf expedition. Sampling events took place in the North Atlantic and Arctic waters which included the Artic Ocean, Barents Sea, Kara Sea, Labrador Sea, Buffin Bay and Greenland Sea. Amphipods were predominantly collected using dredges, epibenthic sledges and remotely operated vehicles but scuba divers and vehicle-free baited traps were also used. This way, over 1566 Amphipod samples were collected in total which include 45 families, 117 genera and 164 species.

The North Atlantic and Arctic Isopoda dataset contains three parts: 1. Distribution records collected from literature; 2. Distribution records of specimens collected by the BIOICE project (Benthic Invertebrates of Icelandic waters 1992-2004); 3. Distribution records of specimens collected by the IceAGE project (Icelandic marine animals: Genetics and Ecology, since 2011). This dataset contains distribution data regarding the 3nd group, isopods occurrences sampled during the IceAGE project

The North Atlantic and Arctic Isopoda dataset contains three parts: 1. Distribution records collected from literature; 2. Distribution records of specimens collected by the BIOICE project (Benthic Invertebrates of Icelandic waters 1992-2004); 3. Distribution records of specimens collected by the IceAGE project (Icelandic marine animals: Genetics and Ecology, since 2011). This dataset contains distribution data regarding the 2nd group, isopods occurrences sampled during the BIOICE project

This Amphipoda dataset contains three parts: 1. Distribution records collected from literature; 2. Distribution records of specimens collected by the BioICE project (Benthic Invertebrates of Icelandic waters 1992-2004); 3. Distribution records of specimens collected by the IceAGE project (Icelandic marine animals: Genetics and Ecology, since 2011). The IceAGE data are outcome of two Amphipoda identification workshops held in Wilhelmshaven, Germany (2016) and Spala, Polen (2017).