Write SQL query to solve given problem: Among the seafoods, how many of them have an order quantity of more than 50?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.ProductID) FROM Products AS T1 INNER JOIN `Order Details` AS T2 ON T1.ProductID = T2.ProductID INNER JOIN Categories AS T3 ON T1.CategoryID = T3.CategoryID WHERE T3.CategoryName = 'Seafood' AND T2.Quantity > 50