The photo was taken at about 7.45am and the incident happened opposite The Trippet.
A resident said there have been issues with cars parking on the shoreline when ‘there is a big local car park here in Bosham for their use’.
“These two cars were not here at 4pm yesterday,” said the resident, adding that the vehicles looked like they had been ‘ruined’. The resident also expressed concern about oil, fuel and engine chemicals leaking into the water of Chichester Harbour.