The jumping spider was feeding on a mosquito while the photo is taken. Artificial light (off-camera flash) was used.

Settings: 35mm, f/14, 1/200, ISO-320
Camera: Olympus OM-D E-M5 Mark II
Lens: Olympus Zuiko Digital 35mm f/3.5 Macro
Other gears: Yongnuo YN560IV flash