{"key":"9c3dc69b-1e8a-42ea-ad51-1f686f8f3e43","installationKey":"a9c3f3b6-1f98-49c3-ba50-7e6aa1c9de59","publishingOrganizationKey":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","doi":"10.15468/34x3ay","external":false,"numConstituents":0,"type":"SAMPLING_EVENT","shortName":"EX2304","title":"Okeanos Explorer (EX2304): Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping","description":"<div><p> From July 14 - July 25, 2023 (Kodiak, Alaska to Unalaska, Alaska), NOAA Ocean Exploration completed the Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping expedition (EX2304), a combined mapping and remotely operated vehicle (ROV) expedition exploring the deep waters around the Aleutian Islands. Operations during this 12-day expedition included the completion of eight ROV exploration dives, including six full dives and two dives that were abandoned during descent due to various circumstances. ROV dives were conducted in water depths ranging from 780 m to 2800 m for a total of nearly 27 hours of bottom time (not including mid-water transects), focusing on exploring benthic habitats (including seep communities), geohazards, and water column communities. EX2304 also collected over 15,000 square kilometers of seafloor bathymetry and associated water column data using an EM 304 multibeam sonar. All data associated with this expedition will be archived within 120 days of the end of the expedition and will be publicly available through the NOAA Archives. </p><p>This research used data collected during NOAA Ship Okeanos Explorer expedition EX2304, led by NOAA Ocean Exploration. Taxonomic identifications provided by the Deep-sea Animal Research Center at University of Hawai&#39;i at Manoa. </p><p><b>Additional Data Resources: </b></p><ul><li> Project website: <a href=\"https://oceanexplorer.noaa.gov/expedition/ex2304/\">https://oceanexplorer.noaa.gov/expedition/ex2304/</a></li><li> Expedition report: <a href=\"https://repository.library.noaa.gov/view/noaa/70924\">https://repository.library.noaa.gov/view/noaa/70924</a></li><li> Data was archived with NOAA’s National Centers for Environmental Information (NCEI): <a href=\"https://www.ncei.noaa.gov/waf/okeanos-rov-cruises/ex2304/\">https://www.ncei.noaa.gov/waf/okeanos-rov-cruises/ex2304/</a></li><li> Annotation dataset (provided by DARC) archived with NCEI: <a href=\"https://oer.hpc.msstate.edu/okeanos/ex2304/Eventlogs/VideoAnnotations-Version2/\">https://oer.hpc.msstate.edu/okeanos/ex2304/Eventlogs/VideoAnnotations-Version2/</a></li></ul><b>Specimen/ Sample Data:</b><ul><li> Sample records archived at NCEI: <a href=\"https://www.ncei.noaa.gov/data/oceans/archive/arc0241/0311845/1.1/data/0-data/EX_SODA_Archive_September_2025/exports/EX2304_Cruise_Specimens.xlsx\">https://www.ncei.noaa.gov/data/oceans/archive/arc0241/0311845/1.1/data/0-data/EX_SODA_Archive_September_2025/exports/EX2304_Cruise_Specimens.xlsx</a></li><li>Biological samples were sent to the Smithsonian National Museum of Natural History (SNMNH): <a href=\"https://collections.nmnh.si.edu/search/iz/\">https://collections.nmnh.si.edu/search/iz/</a></li><li>Geological samples were sent to Oregon State University’s Marine Geological Repository: <a href=\"https://osu-mgr.org/noaa-ex\">https://osu-mgr.org/noaa-ex</a></li><li>Water collected and filtered for eDNA analyses were sent to the SNMNH. <ul><li> Sample catalog numbers: <a href=\"https://geome-db.org/record/ark:/21547/FjJ2\">https://geome-db.org/record/ark:/21547/FjJ2</a></li></ul></li></ul></div>","language":"eng","homepage":"https://www.ncei.noaa.gov/waf/okeanos-rov-cruises/ex2304/","citation":{"text":"NOAA Ocean Exploration (2026). Okeanos Explorer (EX2304): Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping. Sampling event dataset https://doi.org/10.15468/34x3ay accessed via GBIF.org on 2026-10-13.","citationProvidedBySource":false},"contactsCitation":[],"lockedForAutoUpdate":false,"createdBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","modifiedBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","created":"2026-05-12T16:28:50.126+00:00","modified":"2026-09-25T13:56:34.133+00:00","contacts":[{"key":7009925,"type":"ORIGINATOR","primary":true,"userId":[],"position":[],"email":[],"phone":[],"homepage":[],"organization":"NOAA Ocean Exploration","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-05-12T16:29:52.575+00:00","modified":"2026-05-12T16:29:52.575+00:00"},{"key":7009926,"type":"CONTENT_PROVIDER","primary":false,"userId":[],"position":[],"email":[],"phone":[],"homepage":[],"organization":"Deep Sea Animal Research Center at University of Hawai'i at Manoa","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-05-12T16:29:52.577+00:00","modified":"2026-05-12T16:29:52.577+00:00"},{"key":7009927,"type":"DISTRIBUTOR","primary":false,"userId":["https://orcid.org/0000-0002-6451-1139"],"firstName":"Ashley","lastName":"Marranzino","position":[],"email":[],"phone":[],"homepage":[],"organization":"NOAA Ocean Exploration Affiliate","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-05-12T16:29:52.579+00:00","modified":"2026-05-12T16:29:52.579+00:00"},{"key":7009928,"type":"ADMINISTRATIVE_POINT_OF_CONTACT","primary":true,"userId":[],"position":[],"email":[],"phone":[],"homepage":[],"organization":"NOAA Ocean Exploration","address":[],"createdBy":"crawler.gbif.org","modifiedBy":"crawler.gbif.org","created":"2026-05-12T16:29:52.580+00:00","modified":"2026-05-12T16:29:52.580+00:00"},{"key":7606625,"type":"TECHNICAL_POINT_OF_CONTACT","primary":true,"userId":[],"firstName":"Ashley Marranzino","position":[],"email":["ashley.marranzino@noaa.gov"],"phone":[],"homepage":[],"address":[],"createdBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","modifiedBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","created":"2026-09-25T13:55:29.037+00:00","modified":"2026-09-25T13:56:34.240+00:00"}],"endpoints":[{"key":1324014,"type":"DWC_ARCHIVE","url":"https://ipt-obis.gbif.us/archive.do?r=ex2304_videoannotationsandsamples","createdBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","modifiedBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","created":"2026-09-25T13:56:34.489+00:00","modified":"2026-09-25T13:56:34.489+00:00","machineTags":[]},{"key":1324013,"type":"EML","url":"https://ipt-obis.gbif.us/eml.do?r=ex2304_videoannotationsandsamples","createdBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","modifiedBy":"e59f6a41-3eac-46dc-a5e6-ed54c6aac35f","created":"2026-09-25T13:56:34.406+00:00","modified":"2026-09-25T13:56:34.406+00:00","machineTags":[]}],"machineTags":[{"key":33139122,"namespace":"crawler.gbif.org","name":"crawl_attempt","value":"18","createdBy":"crawler.gbif.org","created":"2026-10-09T00:26:19.918+00:00"}],"tags":[],"identifiers":[],"comments":[],"bibliographicCitations":[],"curatorialUnits":[],"taxonomicCoverages":[],"geographicCoverages":[{"description":"Aleutian Islands, Alaska","boundingBox":{"minLatitude":50.0,"maxLatitude":58.0,"minLongitude":-170.0,"maxLongitude":-150.0,"globalCoverage":false}}],"temporalCoverages":[{"@type":"range","start":"2023-07-14T00:00:00.000+00:00","end":"2023-07-25T00:00:00.000+00:00"}],"keywordCollections":[{"thesaurus":"GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type_2015-07-10.xml","keywords":["Samplingevent"]}],"samplingDescription":{"studyExtent":"Aleutian Islands, Alaska","sampling":"ROV expeditions are conducted according to procedures as outlined by Galvez et al., 2025: https://repository.library.noaa.gov/view/noaa/70281.","methodSteps":["ROV expeditions are conducted according to procedures as outlined by Galvez et al., 2025: https://repository.library.noaa.gov/view/noaa/70281 \n\nExpedition report: https://repository.library.noaa.gov/view/noaa/70924"]},"countryCoverage":[],"collections":[],"dataDescriptions":[{"name":"EX2304_Cruise_Specimens.xlsx","charset":"ASCII","url":"https://www.ncei.noaa.gov/data/oceans/archive/arc0241/0311845/1.1/data/0-data/EX_SODA_Archive_September_2025/exports/EX2304_Cruise_Specimens.xlsx","format":"Excel"},{"name":"EX2304_Annotations","charset":"ASCII","url":"https://oer.hpc.msstate.edu/okeanos/ex2304/Eventlogs/VideoAnnotations-Version2/","format":"Excel"}],"dataLanguage":"eng","purpose":"<p>From July 14 - July 25, 2023 (Kodiak, Alaska to Unalaska, Alaska), NOAA Ocean Exploration completed the Seascape Alaska 3: Aleutians Remotely Operated Vehicle Exploration and Mapping expedition (EX2304), a combined mapping and remotely operated vehicle (ROV) expedition exploring the deep waters around the Aleutian Islands. Operations during this 12-day expedition included the completion of eight ROV exploration dives, including six full dives and two dives that were abandoned during descent due to various circumstances. ROV dives were conducted in water depths ranging from 780 m to 2800 m for a total of nearly 27 hours of bottom time (not including mid-water transects), focusing on exploring benthic habitats (including seep communities), geohazards, and water column communities. EX2304 also collected over 15,000 square kilometers of seafloor bathymetry and associated water column data using an EM 304 multibeam sonar. All data associated with this expedition will be archived within 120 days of the end of the expedition and will be publicly available through the NOAA Archives. \n </p><p>This research used data collected during NOAA Ship Okeanos Explorer expedition EX2304, led by NOAA Ocean Exploration. Taxonomic identifications provided by the Deep-sea Animal Research Center at University of Hawai'i at Manoa.</p>","acknowledgements":"<p>This research used data collected during NOAA Ship Okeanos Explorer expedition EX2304, led by NOAA Ocean Exploration. Taxonomic identifications provided by the Deep-sea Animal Research Center at University of Hawai'i at Manoa.</p>","pubDate":"2026-05-12T00:00:00.000+00:00","maintenanceUpdateFrequency":"UNKNOWN","maintenanceDescription":"","license":"http://creativecommons.org/licenses/by/4.0/legalcode","dwca":{"coreType":"http://rs.tdwg.org/dwc/terms/Event","extensions":["http://rs.iobis.org/obis/terms/ExtendedMeasurementOrFact","http://rs.tdwg.org/dwc/terms/Occurrence"],"modified":"2026-05-12T16:29:52.510+00:00"},"approximateCounts":{"occurrenceCount":13728}}