Cooking Light - She Crab Soup - This Carolina lowcountry soup gets its name from the generous dollop of crab roe that customarily garnishes the top. Crab roe is available in season (May-August), but this creamy soup is just as delicious without it.
Avocado Soup with Citrus-Shrimp Relish : This lovely no-cook soup is thick and creamy, and a meal in itself with its topping of lemony shrimp. It weighs in at less than 300 calories a bowl, so pair it with a side salad for a well-rounded meal.
Barefoot Contessa - Recipes - Lobster Corn Chowder, this would be good with substitutions for a low fat version. I make a sea food chowder that is yummy and low fat, but you wouldn't know. I think that similar recipe with only lobster=Yum!