First oBike spotting, now oBike fishing.

The yellow shared bikes are again attracting attention for the wrong reason - this time because of the sheer numbers of them at the bottom of the Yarra.

Contractors working for oBike fished out 42 cycles from the Yarra within four hours on Tuesday.

The haul comes a month after Melbourne lord mayor Robert Doyle said he would run the bikes out of town unless the Singaporean parent company could control its wayward fleet.