Cook pasta according to package directions, omitting salt and fat.
Drain. Set aside and keep warm.
Heat 1 tablespoon oil in a large nonstick skillet over medium-high heat.
Add shrimp and scallops to pan; sprinkle with salt. Saut 3 minutes or until almost done.
Remove shrimp mixture from pan.
Heat remaining 1 tablespoon oil in pan over medium-high heat.
Add onion, garlic, fennel seeds, pepper, and pancetta to pan; saut 1 minute. Stir in tomatoes; bring to a boil. Cook 2 minutes, stirring occasionally. Return shrimp mixture to pan; cook 1 minute or until thoroughly heated.