Yes, I tried Google and a French Search Engine I found two photos on Ship Spotters.com but no information.
"Croisic" (the name of the tug" is also a small port in Brittany with an Aquarium, I can find more than enough info. on them (....some nice apartments overlooking the "Cote Sauvage"......) but nothing on the tug.
The French tend to be far more restricted in what information they make available on the Internet than the Brits. and seem to work from a premise, "Who are you and why do you want to know?". I caused a stir by innocently enquiring about who the Departmental Prefect (the top Civil Servant with huge personal power appointed by the President) is here in the Vendee, I was accused of jeopardising security and making enquiries about things which did not concern me!
I was hoping there would be some central Register of Shipping but I have made no progress to date. The only other clue I have is that the owners have the insignia of a white capital letter B on a red square.
Roger in France.