For any Carthaginians fleeing the destruction of their city, there are plenty of places within the scope of the Mediterranean world where they could go. It would still be over a century after 146 BCE before Rome would conquer most of it. There were quite a few Punic colonies along the coasts of Mauretania that Rome ignored. Some could have sought refuge with the Numidian kings, and others would have just gone to Syria, Phoenicia or Egypt. These were easier choices to make in comparison to exploring the great body of water which is the Atlantic Ocean using triremes.