It looks like your build-plate (print bed) is out-of-level. Specifically, your printer's nozzle is too close to the build plate as witnessed by the first layer being semi-translucent in some areas but not others; This indicates it's very thin.
The defect you see is parts of the first layer being 'peeled' up by the printhead as it moves by, as excess plastic has built up in those areas, causing the hot-end to smash into them and delaminate them as it attempts to print other parts of the part.
If you don't already know how to level/tram your bed, check out your printer's manual for instructions (if it has any) or read a Bed-Levelling guide