When you walk into a Mexican restaurant with fajitas and nachos on the menu, you might be inclined to indulge in your standbys. You can do that at Palapas, too, and you'll leave with a great impression of the restaurant. But where this Greenville Avenue newcomer really excels is with ingredients that hail from the sea, in ceviches and grilled fish dishes that absolutely sing. Get the shrimp ceviche served on a crunchy tostada for a textural contrast, or a mixed seafood ceviche served in a young coconut. And if you have a hangover you might consider the camarón in agua chili, which features shrimp quickly cooked in lime juice and served in a freshly blended sauce of cilantro, more lime juice and shrimp stock. You certainly don't need a hangover to enjoy the dish, but if you had too much tequila the night before it can be a godsend.