A motorcyclist injured his neck and leg when he crashed into a water filled ditch in Exceat on Saturday May 17.
Sussex Police said the incident took place shortly after 11am in Litlington Road, north of the junction with the A259 East dean Road.
The 64-year-old Seaford man was riding a black Yamaha XVS motorcycle. No other vehicles were involved.
The road was temporarily closed while emergency services dealt with the incident.
He was taken to the Royal Sussex County Hospital, in Brighton. He is in a serious but stable condition.
Anyone who saw what happened or who may have other information is asked to phone Sussex Police on 101 or email firstname.lastname@example.org, quoting serial 629 of 17/5.