This data set shows the day-/night feeding behaviour of Arbacia lixula, Cerithium spp. and Paracentrotus lividus under artificial light at night (ALAN), derived from time-lapse photography, with acclimation.

Time-lapse photo classification:0 = No photo1 = Elsewhere in the aquarium2 = On the pellet (= feeding event)3 = In the shelter4 = Animal with pellet in shelterExperiment 1: with ALAN acclimationType of experiment/method: Laboratory experiment with field-collected animalsStart experiment: 2021-07-01T00:00:00End experiment: 2021-08-07T00:00:00Species name: Arbacia lixula, Paracentrotus lividus, Cerithium spp.Replicates per treatment level: n=21-24 (Arbacia), n=22-24 (Paracentrotus), n=18 (Cerithium)Number of total replicates: n=68 (Arbacia), n=70 (Paracentrotus), n=54 (Cerithium)Type of water supply method: Header tankRoom temperature range: 23-27°CAquaria water temperature range: 24-27°CAquaria salinity range : 36.8-37.3 PSUIndependent variable: Length of ALAN: None, Half-night, Full-nightALAN intensity: 30 luxAcclimation phase: 12 days light and lab (sea urchins), 15 days (Cerithium spp.)Water exchange rate. Daily (half of the aquarium volume)Ammonia tests: Daily (aquaria or collection tanks)