They say certain fishing methods are seeing the dolphins accidentally killed.
The body of the stowaway was found after the plane - coming from the Ivory Coast - had landed in Paris.
France commemorated on Tuesday the cartoonists who were massacred by two gunmen at the Charlie Hebdo satirical magazine in Paris five years ago.
Notre Dame de Paris, the beloved French cathedral, is not saved yet, the general overseeing the restoration of the landmark after the devastating April fire has said.
Paris pension protests continue
He had received care in a mental health facility until last May. But prosecutors are not ruling out it was a terrorist act.
Monsignor Patrick Chauvet said the fire-damaged Notre Dame is so fragile that “there is maybe a 50% chance that it will be saved."
In Paris, half metro lines were announced to be running as normal, while many stations remained closed.
Anna Karina, the epitome of French New Wave cinema, has died of cancer at the age of 79. The French-Danish star was the former muse of film director Jean-Luc Godard
Madrid, Paris, Brussels and London are among the European capitals to host climate change protests
Unions across France launched open-ended strikes on Thursday over the government's plan to overhaul its retirement system.
Nico Semsrott says he has found a loophole that will prevent MEPs having to move from Brussels to Strasbourg every month.
Rubbish bins and cars were set on fire as 'yellow vest' ('gilets jaunes') protesters hit the streets again to mark the movement's one-year anniversary.
Did you forget about France's fluorescently-clad protesters? Well, on Saturday, they were back to show their frustrations haven't gone away.
Urban climber Alain Robert, also known as the "French Spider-Man", scaled a skyscraper in Paris on Wednesday.
Over 13,500 people marched in Paris on Sunday against Islamophobia, in a controversial protest that created tensions on the left and attracted criticism from the French government and right-wing parties.
French chocolate-maker Patrick Roger built a giant chocolate 'wall' in Paris to celebrate the 30th anniversary of the Berlin Wall's fall.
The window displays, which this year are dubbed "A very curious Christmas", feature animals in zany scenes.
Buses took away more than 1,600 migrants who were camped in the Porte de la Chapelle and Seine-Saint-Denis area.
The fashion show celebrated chocolate-producing countries including Peru and Ivory Coast.
The blob doesn't have a brain but can solve problems, and has no mouth but can eat food. It heals itself in two minutes, moves 4cm per hour without limbs and has 720 sex organs.
The French culture minister is more concerned with quality over speed.
Getafix and Obelix joined festivities at Gare de Lugdunum.
Leonardo da Vinci's masterpiece had been moved due to renovations.
In an interview, Christophe Castaner said there were administrative "failings" in monitoring the attacker who killed four people last week.
In the weeks leading up to the attack, he had adopted an increasingly radicalised behaviour, the prosecutor said, justifying the terror attacks on Charlie Hebdo newspaper that left 12 dead in Paris in 2015, trading his clothes for traditional religious ones and stopping to have contact with women.