No the roto-molded tanks from Moellor Marine are poly or plastic.* FRP are fiberglass and resin I assume.* If the Frp tanks are tested to the USCG specs. they meet the minimum requirement.
It seems to me when a boat catches on fire you have very little time to really save the boat.* Getting the crew to safety probably is high on the list.* It is a something I hope none of us has to deal with.* JohnP