This dataset presents information on the vertical distribution and abundance of juvenile and adult myctophids (F. Myctophidae) throughout the daily cycle in the Northeast Atlantic Ocean. The survey extended from south of the Canary Islands to south of Iceland and was carried out in May 2018. Results evidenced the diel vertical migration pattern to the upper 200 m of the water column, during night-time, and the return to the mesopelagic layers during the day, This research was funded by project "Biomasa y flujo activo en la zona batipelagica. BATHYPELAGIC. (CTM2016-78853-R), Peer reviewed

This dataset gives information on the vertical distribution and abundance of early stages of meso and bathypelagic fishes throughout the daily cycle in the Northeast Atlantic Ocean. The larvae of the majority of species were found in the upper 100 m of the water column, both day and night. Transforming stages of myctophiforms and stomiiforms tend to be located at deeper depths during the day than at night. The most abundant specimens collected with the MOCNESS plankton net were the adults and juveniles of Cyclothone species, which do not show significant differences in vertical distributions between day and night, This research was funded by project "Biomasa y flujo activo en la zona batipelagica. BATHYPELAGIC. (CTM2016-78853-R), Peer reviewed