RedactedNarrative: Occupant advised she and the operator of the pwc were going fast (+-30 mph) entering a small creek off snook hole channel. they turned left then right quickly upon entering then had to make another sharp left turn. Operator let off throttle and vessel slid into mangroves. operator was injured via a puncture wound in the neck from a mangrove branch. she applied direct pressure and started screaming for help. Her brother, on a different pwc, came to their aid.  operator received stitches to close the wound, no throat or arterial damage.