Oh no no... Marinara Sauce is not at all what Wiki says.
Yep, I perfectly understand you, many people confuse it since the name 'Marinara' automatically is connected with seafood, yet, even if close to it, it is not due to the seafood but to the sailors, which in Italian is 'Marinai'. Its name comes from the fact that the ingredients, easily preserved for a long time, could be brought by Marinai - Sailors, to season the bread during their long journeys.
So drum roll....... Marinara sauce is related to Marinai and not to the seafood
Back to the ingredients about Marinara sauce (it's Neapolitan, by the way), there is no trace of seafood in, it's only made with tomato sauce, garlic, oregano, oil, nothing else. If you add capers or black olives or anchovies, it's a marinara sauce base with capers, black olives and anchovies, but they all together give life to another sauce that you love very much, that is the puttanesca sauce (always Neapolitan).
And about Pizza Marinara, same thing, you will get nothing but a pizza with tomato sauce, garlic and oregano and a drizzle of Extra Virgin Olive Oil