Owner Laskaridis told TradeWinds the 436,368-cbf Frio Athens (built 1988) was targeted by gunmen 55 miles from Bonny on 4 May.
The crew employed evasive manoeuvres as bullets hit the accommodation area.
There were no injuries to crew and the gunmen did not board.
Laskaridis said it would continue to trade in the region, but was requesting extra assistance from authorities - possibly an escort into Port Harcourt.
On
