Protesters were spending the night at a checkpoint where lorries carrying fish from Britain into the northern French ports of Dunkirk and Calais are subject to hygiene checks, now that the UK has left the European Union.
The fishermen set fire to pallets and tyres at the Boulogne-sur-Mer checkpoint, France's busiest fishing hub.
No trucks from the UK appeared to have been disrupted, with some changing routes upon news of the planned action.
British-flagged ships operated by Dutch companies, which often unload fish caught in UK waters at French ports, had also changed course towards Belgium, according to the harbour master's office.
A second group of protesters staged their overnight blockade in front of the Boulogne fish market.
"This night of action is a warning shot," said Olivier Lepretre, head of the regional fishing committee. "If nothing happens at the European level, we will shift up a gear."
Fishing licences granted to 22 out of 120 boats
Lepretre said UK authorities had only granted licences to 22 out of the 120 boats seeking permission to fish between six and 12 nautical miles from the British coast.
Local mayor Frederic Cuvillier threw his backing behind the fishermen, calling for the EU to "wake up" and protect the European fishing industry from Brexit's impact.
"The cruel truth is that there is no fishing deal," said Cuvillier, a former Socialist fishing minister, describing the situation as "desperate".
Fishing became a hugely fraught issue in negotiations late last year over an agreement to govern Britain and the EU's post-Brexit trade relationship.
The UK had insisted it wanted to take back control of its waters while EU coastal states sought guarantees that their fleets could keep fishing in British waters.
- French fishermen to get up to 30,000 euros in aid under Brexit trade deal
- British fishermen believe they have been sacrificed for Brexit deal
London and Brussels eventually reached a compromise that will see European boats gradually relinquish 25 percent of their current quotas during a five-and-a-half-year transition period.
British fishermen, many of whom sell their catches in Europe and rely on rapid transport, have also been deeply unhappy with the post-Brexit situation, saying that extra red tape is threatening their livelihoods.
(with AFP)
