List of fish species identified and cross-referenced by an integrative taxonomy analysis. Specimens were identified to the lowest taxonomic level using morphological features. A sub-sample of small muscle tissue from each individual was taken for DNA extraction and amplification of two mitochondrial genes, cox1 and the non-coding control region (CR). Special attention was given to larval and juvenile specimens. Samples were collected by fishery observers on board krill fishing vessels for the winter seasons between 2019 and 2024. Extra samples collected before 2019 were obtained from the biological archives at BAS including muscle and fin tissue as well as otolith samples spanning from 1988 through 2022. All samples were measured and photographed prior to be subsampled for DNA. Most samples were blast-freeze and stored at -20 degrees C or fixed in 90% ethanol. Tissue samples were stored in 90-95% ethanol and kept at -20 degrees C. Data resources from this project were used to developed enhanced identification guides for larval and adult fish species caught as bycatch within the Antarctic krill fishery. This is a Darwin plus initiative awarded to Philip, R. Hollyman under round 10 funding scheme, project reference DPLUS166.

This dataset consists of biomass data and diet composition of mackerel icefish (Champsocephalus gunnari) from the South Georgia groundfish survey, collected during scientific trawl surveys from 1986 to 2023. These data were primarily collected to produce estimates of mackerel icefish biomass to inform management of the icefish fishery, and to further our understanding of icefish ecology, distribution, and diet. Data were primarily collected by Martin A. Collins, Mark Belchier, Inigo Everson, Jude Brown, Phil Hollyman, Simeon Hill, Tom Marlow, Caradoc Jones, Rebecca Mitchell & Sue Gregory. Since 1990, the South Georgia groundfish surveys were funded by the Government of South Georgia and the South Sandwich Islands. Earlier surveys were funded by the US and Polish governments.