Umi Sushi, in the Fens, offers up the standard, gimmicky, dragon roll-y fare of a fish joint in a too-popular neighborhood. With one exception: the Red Sox maki. It’s hard to figure how they came up with the recipe, which consists of, in their hyper-descriptive words, "sweet potato wrapped with baked eel & avocado, shrimp tempura inside with crabstick, eel, roe, avocado & scallion outside". Is it red? Does it look like a sock? Is it a green monster? (there’s avocado, so perhaps) Is it shaped like a tarpaulin? (they always reminded us of rolls wrapped in Nori, to be honest) I shudder to think of the other possible menu additions, like a "Bleacher Creature", or, worse, an homage to the rivals, a "Bronx Bomb". I do know that anything called a "Gary Sheffield" would have to involve crab, and that a "Graffanino" sounds like it should be served not at a Sushi joint, but in the North End.