If you're going to Brittany try to go visit Scubaland in Brest, it's easy to find, chock full of spearing gear and they're very freindly and would no doubt have all the info you needed about spearing down that way.
And while you're there go have a look around Oceanopolis which is just down the road.
And while you're there go have a look around Oceanopolis which is just down the road.