Scuds have a very interesting way of producing young.
The male clasps the female with his legs and swims around holding her beneath him for a few days. During this time he fertilizes her eggs which are still inside her brood pouch. This brood pouch is under her thorax or the middle part of her body. The eggs hatch in nine to thirty days, depending on conditions such as water temperature and food supply. If the temperature is higher and there is plenty of food, the eggs hatch sooner.