Mound hot potatoes equally in warm, wide soup bowls.
Arrange equal portions of herb-poached seafood around potatoes, then ladle the seafood hot broth over the seafood. Sprinkle servings with red bell pepper and chives.
Push 1 crouton upright into each potato mound, or lay on dish rim. Accompany the bouillabaisse with remaining croutons and the spicy aioli; add salt and pepper to taste.