Fuel protests triggered by rising oil prices have spread to more countries across
Union leaders said
French fishermen have been protesting for weeks, with Belgian and Italian colleagues also involved.
The strike reflects anger at the rising cost of fuel, with oil prices above $130 (83.40 euros; £65.80) a barrel.
Trade unions say the cost of diesel has become prohibitively high, after rising 300% over the past five years.
Wholesale fish prices, meanwhile, have been static for 20 years.
Fishermen's leaders from
The protesters are calling for direct immediate aid for the fisheries industry, coupled with increased subsidies.
The European Commission said in a statement it was willing to show flexibility towards the industry but it has ruled out subsidies to offset rising fuel costs.
Short-term aid packages were acceptable as long as they were used to address structural deficiencies in the fleets, it said.
'Ruin for fishermen'
Several thousand fishermen marched on the agriculture ministry in
Many blew whistles and klaxons, and let off firecrackers producing red smoke.
The BBC's Steve Kingstone at the protest said he could see flags from
One banner read: "Soaring diesel plus cheap fish equals ruin for fishermen." Another chided Prime Minister Jose Luis Rodriguez Zapatero: "You are sending us to the cemetery."
One union leader in
"Compliance is total. The entire Spanish coast is at a halt," Jose Caparros told AFP news agency.
The unions also say they could blockade ports, a day after French police forcibly removed fishermen blocking oil depots.
"We must mobilise like the French and if we have to block ports, we'll block them," Xavier Aboy, a union leader in
In
At dawn on Thursday, French riot police cleared protesters from the Mediterranean oil depots of Fos-sur-Mer and Lavera, and a Total refinery at La Mede in the south.
On the same day police clashed with fishermen who burned tyres in the Atlantic
On Friday, protesters blockaded the Channel
Hundreds of farmers have also been blocking oil terminals near the cities of
In
But the BBC's David Willey in Rome says many fishermen are adopting a wait-and-see policy as talks with the government continue, and in the Adriatic ports the response to the strike has been mixed.
"No boats went out" in
Bulgarian bus drivers are also planning a one-hour strike on Friday, following protests by lorry drivers on Wednesday.
PHOTO CAPTION:
Fuel protests in Europe
BBC