Fig. 4

A visual depiction of depth use (upper panel) and tri-axial acceleration (lower panel; teal; x-axis, gold; y-axis, red; z-axis) for the OCS across an 18 h period between 12-Nov-2018 12:10 and 13-Nov-2018 01:30 UTC pre and post hooking. Each letter represents a change in shark behavior across the capture process. Points A–B show normal yo-yo diving behavior. Near point C the shark likely gets hooked or first experiences tension from the line if it was hooked during the ascent between points (B) and (C). Between points C and D, the shark fights actively against the gear and brings it towards the surface. Between points D and E, the shark struggles on the line at the surface, then gradually sinks (times E–F) while on the line. The negative value of the z-axis acceleration (red) indicates the tag was in an upright orientation, pointed towards the surface. The shark is brought to the surface between points (F) and (G) due to the tension from the haul of the longliner. Point H depicts the shark being handled near the vessel where it was recorded as dead on the line