I have seen them on other destroyers in my campaigns ( External views can be a horrible thing

)
Unless you want to check out each of your opponents with the external cam you won't know if they will have it.
I've lost 2 crews to those hedgehogs and came away once with heavy damage... other times i was deep enough to probably only just clear the buggers.
But i find the main weapons of choice for those DDs are still depthcharges.