| Summary: | Larval red drum (10 to 14 days post-hatch) were assessed for visual function using behavioral and morphological assays. Optomotor response was determined using a rotating drum apparatus. Behavioral tests were video recorded and analyzed for a maximum rotational speed of larvae exhibited during the assay. Larvae were subsequently preserved and sectioned histologically to determine alterations in retinal layers due to oil exposure, with sections photographed and examined using ImageJ software (V1.47). Related data on effects of weathered crude oil on visual function in sheepshead minnow is available under GRIIDC Unique Dataset Identifier (UDI) R4.x258.000:0025 (DOI: 10.7266/N7PK0DH5). This dataset supports the publication: Magnuson, J. T., Khursigara, A. J., Allmon, E. B., Esbaugh, A. J., & Roberts, A. P. (2018). Effects of Deepwater Horizon crude oil on ocular development in two estuarine fish species, red drum (Sciaenops ocellatus) and sheepshead minnow (Cyprinodon variegatus). Ecotoxicology and Environmental Safety, 166, 186–191. doi:10.1016/j.ecoenv.2018.09.087
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