Roe fish are a type of fish that are highly valued for their roe, or eggs. The two most common types of roe fish are SHAD (4 letters) and STURGEON (8 letters). SHAD are an anadromous fish, meaning they migrate between fresh and salt water, and are found in the Atlantic and Pacific oceans. STURGEON are an ancient species of fish that can be found in rivers and lakes around the world. They are prized for their caviar, which is made from their roe.