The diver, known as Shane, initially plunged into the Water of Leith in the city’s Leith area this morning after his Deliveroo delivery rider friend had his bicycle pinched by a group of teenage yobs.
The youngsters launched the bike into the river when they were caught red handed.
The 26-year-old fully certified diver told how he was « shocked » to find around 14 just Eat bikes on his first trip.
But he certainly got more than he bargained for when he went back for a second look.
A Facebook group covering Shane’s adventures into the deep said he came across a « possible stolen » safe with a stash of porn magazines, a video camera and « lots of condoms. »
He also discovered at least 25 bikes, a trolley, some suitcases, a bath tub and a mystery SECOND safe near to the site at Sandport bridge.
The post read: « Shane was diving again this afternoon.
« A more thorough investigation found at least 25 bikes around Sandport bridge, a trolley, some suitcases and a bath tub.
« A possibly stolen safe revealed a stash of porn mags, video camera and lots of condoms. There was yet another safe next to it.
« Too heavy to remove today – over 35kg. »