Abstract:
Sixteen species of oceanic shrimps, seven Penaeidea and nine Caridea, appeared in 244
collections made within the upper 1500 m at one station in the northeast Pacific off Oregon.
Most of the species were primarily mesopelagic in distribution.
The most abundant species, Sergestes similis, was the only shrimp common in epipelagic
waters at night and the only species clearly demonstrating did vertical migrations. Night catches
exceeded day catches in near-surface waters, while day catches exceeded night catches at mid-depths.
Sergestes similis migrated into the upper 50 m at night and on one occasion was collected
at the surface.
