It is the Kongsberg
Naval Strike Missile
A good successor to the Harpoon, with similar performance but stealthier, build and designed by Kongsberg of Norway.
Can be ship based, land based or air launched.
Apparently the "Joint Strike missile" moniker was given in order to market it as a weapon for the Joint Strike Fighter.
It is the only missile of its class to fit into the bomb bay of the F-35.
Wouldnt be the first Kongsberg missile to be accepted by the US, Kongsberg also developed and build the Penguin.
So far it is only in service with the norwegian navy, and Poland ordered truck mounted NSMs.