The crossword solution for the term BOUILLABAISSE BIT is MUSSEL, which is a six-letter word. Mussels are a type of edible bivalve mollusk that are commonly used in bouillabaisse, a traditional Provençal fish stew originating from the port city of Marseille in France. The mussels are usually cooked in a broth made with a variety of different fish and shellfish, along with vegetables, herbs, and spices.