What could possibly be unhealthy about a sushi roll?
While some rolls are actually healthy, plenty others contain tasty but caloric mayonnaise-based sauces, cream cheese, crunchy (read: fried) cucumbers or eel, and "special sauces" that are often cream-based. Add those up and your seemingly harmless dragon roll suddenly packs up to 500 calories or more.
Luckily, it's easy to keep sushi on the healthier side. Forego creamy sauces and "crunchy" toppings, and stick with the basics. You'll still get great taste, just fewer calories. While you're at it, try your hand at making your own California sushi roll.