https://ipt.gbif.no/resource?r=aspecto-1 Kelsey Archer Barnhill 0000-0001-6882-1209@orcid.org 0000-0001-6882-1209 Kelsey Archer Barnhill kelsey@aspecto.no 0000-0001-6882-1209 Cathrine Alegretti cathrine@oceanpro.no Kelsey Archer Barnhill 0000-0001-6882-1209@orcid.org 0000-0001-6882-1209 2026-04-10 eng Underwater video transects were carried out at Skarvhammaren, Nordland, Norway between 31 March and 30 April 2025. The dataset contains 1 229 observation points of sponges, corals and sea pens recorded along 22 transects, with associated depth, geographic coordinates, substrate type, organism size class and abundance counts. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. 65.827°–65.843° N, 12.533°–12.570° E (WGS84) -180 180 90 -90 2025-03-31 2025-04-30 unknown Kelsey Archer Barnhill 0000-0001-6882-1209@orcid.org 0000-0001-6882-1209 High-definition ROV video transects. Each transect was divided into sequential datapoints (A–Q). At each datapoint the ROV paused and organisms visible within the frame were identified to species where possible, counted and measured. Depth was recorded from the ROV pressure sensor (metres). Geographic position was logged by USBL navigation in WGS84. Substrate was classified visually into four categories: FF (fine fines), S (sand), G (gravel) and St (stone). Colony diameter (corals) was estimated visually to the nearest 10 cm. 2026-04-10T13:48:40.985+00:00 dataset https://ipt.gbif.no/resource?id=aspecto-1/v1.1.xml