A scallop fisherman who is thought to have fallen overboard off the Welsh coast is a 38-year-old Romanian national, say coastguards.
A search was abandoned on Friday morning after the man disappeared in water about six miles off Cemaes Head, near New Quay, on Thursday afternoon.
Coastguards co-ordinating the hunt for the man in Cardigan Bay added that he was not wearing a life jacket.
Three RNLI lifeboats, an RAF helicopter and fishing boats joined in the search.
A spokesman for the coastguard said: "The missing crewman was 38 years old of Romanian nationality.
"He was not wearing a lifejacket when he fell overboard, after losing his balance whilst the vessel was hauling its dredges.
"The man was seen to go overboard and the skipper turned the vessel around and threw a life ring to the casualty, who was then seen to sink below the surface.
"Unfortunately he was not wearing a lifejacket, which hindered his chance of survival, coupled with the fact that the water is very cold at this time of year which also plays a major factor in survivability."
The coastguard abandoned the search on Friday morning saying it had "received no new information at this point".
It said if more information came to light it would resume the hunt for the man.
Two lifeboats were launched from Cardigan and another from New Quay on Thursday at about 1330 GMT.
The lifeboats returned to refuel later, before resuming detailed searches for the missing man.
A helicopter from RAF Valley on Anglesey also joined the search, which was being coordinated by the coastguard at Milford Haven.
The fishing boat was believed to be the Maggie Ann, registered and operated from Fraserburgh in north-east Scotland.