In Situ Ichthyoplankton Imaging System (ISIIS) classified taxa concentrations and environmental metadata for 3 transects from the Mobile Bay plume process study, R/V Point Sur cruise PS16-20 (PTS02), 2016-04-09 to 2016-04-11

These 1-m vertically binned concentration data were collected with the In Situ Ichthyoplankton Imaging System (ISIIS) to describe the distribution and concentration of organisms along a transect immediately downstream of the Mobile Bay plume. Data were collected from the R/V Point Sur cruise PS16-20 as part of the CONCORDE program to examine how variable river discharge affects larval fish fine-scale distributions and predator-prey spatial relationships. Larval fishes, their planktonic prey (calanoid copepods), and gelatinous planktonic predators (ctenophores, hydromedusae, and siphonophores) were sampled across multiple freshwater pulses exiting Mobile Bay in the northern Gulf of Mexico (USA) during a large freshwater discharge event (2016-04-09 - 2016-04-11). Sampling transect 023 was carried out during daylight (April 9, 2016 10:13-13:52 CDT), while transects 024 (April 9-10, 2016 21:27-02:11 CDT) and 026 (April 10-11, 2016 21:04-00:42 CDT) were conducted at night. A sparse Convolutional Neural Network (sCNN) automated classification of different organisms within the ISIIS images. The data include 1-m vertically binned concentrations for each listed plankton taxa along with corresponding average environmental data (temperature, salinity fluorescence, oxygen, PAR) and example images of the inventoried taxa. Due to its size, the entire library of images is not available but may be requested from the dataset author.