Brexit is one of the biggest unkowns Ireland's seafood industry is currently facing, John Nolan, managing director at Castletownbere Fisherman's Co-op, told IntraFish.

The co-op, which fetches 75 percent of its €56 million ($60.2 million) annual turnover from exports, is seeing challenges on both the fishing and the market side.

The United Kingdom is a major market for Irish haddock, and this is also the case for the co-op. In addition, 30 percent of its shrimp are caught in British waters.

"Brexit is a worry, of course," Nolan said.