This dataset reports species caught using longline and trap sets during the R/V Apalachee cruise AP-1407 from May 28-30, 2014. The main objective of this project was to use large chevron traps and demersal longlines to describe and examine differences in the species assemblages and relative abundances of demersal fishes associated with the eastern and western walls of DeSoto Canyon and the adjacent continental slope (75-2000 m deep). The other objectives were to collect liver and bile samples from dominant species to examine spatial and depth-mediated differences in exposure to polycyclic aromatic hydrocarbons (PAHs), to collect muscle tissue from all species for stable isotope analyses including using radiocarbon ratios to examine attenuation of long-term exposure to hydrocarbons, and to collect specimens and samples (including curation of new species) to aid in resolving phylogenetic uncertainties and understanding life history traits in collected taxa. This dataset contains the metadata and sample data associated with the above objectives.

This dataset reports species caught using longline and trap sets during the R/V Apalachee cruise AP-1415 from October 02 to October 10, 2014. The objectives of this project were 1) to use large chevron traps and demersal longlines to describe and examine differences in the species assemblages and relative abundances of demersal fishes associated with the eastern and western walls of DeSoto Canyon and the adjacent continental slope (75-2000 m deep), 2) to collect liver and bile samples from dominant species to examine spatial and depth-mediated differences in exposure to polycyclic aromatic hydrocarbons (PAHs), 3) to collect muscle tissue from all species for stable isotope analyses including using radiocarbon ratios to examine attenuation of long-term exposure to hydrocarbons, and 4) to collect specimens and samples (including curation of new species) to aid in resolving phylogenetic uncertainties and understanding life history traits in collected taxa. This dataset contains the metadata and sample data associated with these objectives.

This dataset contains fish data collected using fish traps and demersal longlines and includes biological data, for some species, such as length and weights. Additional data include the dates, set locations (latitudes, longitudes), depth, water temperature, gear deployed and bait used. These data were collected during the R/V Apalachee cruise AP-1509 on July 1 to July 9, 2015. The objectives of this project included to describe and examine differences in species assemblage and relative abundance of demersal fishes in the Gulf of Mexico.

This dataset contains fish data collected using fish traps and demersal longlines and includes biological data, for some species, such as length and weights. Additional data includes date, set locations (latitudes, longitudes), depth, water temperature, gear deployed and bait used. These data were collected during the R/V Apalachee cruise AP-1405 from May 1 to May 8, 2014. The objectives of this project included to describe and examine differences in species assemblage and relative abundance of demersal fishes in the Gulf of Mexico.

This dataset contains CTD data collected aboard R/V Endeavor cruises EN509 and EN510 (sequential legs) using a CTD-rosette system in the Gulf of Mexico from 2012-05-26 to 2012-07-04. The physical and chemical properties in the water column at the ECOGIG seep and other study sites were characterized The dataset also includes binned profiles and bottle files.

Conductivity Temperature and Depth (CTD) measurements were collected aboard the M/V Sarah Bordelon, Cruise 07 to determine physical oceanographic parameters of the water column, and in some cases used to help guide sample collection as part of the Deepwater Horizon oil spill sampling effort. Temperature, conductivity/salinity, depth, dissolved oxygen, and fluorometry data were collected onboard the M/V Sarah Bordelon, Cruise 07. The final product is a series of NetCDF files containing every CTD cast that has been processed and quality checked.

Physical and profile oceanographic data were collected aboard the ENDEAVOR in the Gulf of Mexico from 2010-06-17 to 2010-06-30 in response to the Deepwater Horizon Oil Spill event on April 20, 2010, by the Subsurface Monitoring Unit (SMU), which consisted of multiple government and corporate agencies. These data include temperature. The instruments used to collect these data included CTD along with other physical sampling devices. More specific information about each dataset is located in their individual metadata records. The CTD data underwent preliminary quality assurance and control procedures at the National Coastal Data Development Center (NCDDC). Cruise level information consisting of data management documents, cruise reports and plans, videos and pictures, and other miscellaneous documentation were gathered by the data managers.

Conductivity Temperature and Depth (CTD) measurements were collected aboard R/V F.G. Walton Smith to determine physical oceanographic parameters of the water column, and in some cases used to help guide sample collection as part of the Deepwater Horizon oil spill sampling effort. **Temperature, conductivity/salinity, depth, dissolved oxygen, and fluorometry data** were collected onboard R/V F.G. Walton Smith, Cruise 03. The final product is a series of NetCDF files containing every CTD cast that has been processed and quality checked.

Conductivity Temperature and Depth (CTD) measurements were collected aboard the 25 Foot Parker, Cruise UV1 to determine physical oceanographic parameters of the water column, and in some cases used to help guide sample collection as part of the Deepwater Horizon oil spill sampling effort. Temperature, conductivity/salinity, depth, dissolved oxygen, and fluorometry data were collected onboard the 25 Foot Parker Cruise UV1. The final product is a series of NetCDF files containing every CTD cast that has been processed and quality checked.

Conductivity Temperature and Depth (CTD) measurements were collected aboard R/V F.G. Walton Smith to determine physical oceanographic parameters of the water column, and in some cases used to help guide sample collection as part of the Deepwater Horizon oil spill sampling effort. Temperature, conductivity/salinity, depth, dissolved oxygen, and fluorometry data were collected onboard R/V F.G. Walton Smith, Cruise 01. The final product is a series of NetCDF files containing every CTD cast that has been processed and quality checked.