There is a woman, China pronounced Cheena who sells homemade Ceviche on the beach usually late afternoons downtown. We were At Aqua Marina and had it twice during the week. It is the best and she also has shrimp cocktail that is great. She has them in plastic cups and provides chips to dip as well as forks. She lives close by that area. I know the people at Aqua Marina know her.
Great to just sit on the beach and pig out.