Raw data and summary values of activity and shelter use across each 23-hour trial.

23 observations of 60 seconds were recorded during each 23-hour trial, thus each trial comprises 1380 seconds of observation. The time that each animal spent active in view of the camera, inactive in view of the camera and inside shelter is shown in seconds (columns G-O). Time spent active was divided by total time in view of the camera (time active + time inactive) to give proportion of time active (columns Q, S and U). Time spent active or inactive was only recorded when the individual was in view of the camera, thus time active + time inactive is not necessarily equal to total trial time (1380 seconds).Time spent inside shelter was divided by total trial time (1380 seconds) to give proportion of time inside shelter (columns W,Y and AA). These proportions were than transformed using equation one to remove any values of 0 or 1 (these transformed proportions are labelled proportion_no01; columns R, T, V, X, Z and AB). Total length of lionfish, lobster carapace length and Diadema test diameter are also provided (columns D, E and F). (CSV)