2. Steamed sea rainbow tastes similar to boiled sea rainbow. The only difference is that the boiled sea rainbow tastes lighter, and the clear water will lose some nutrients, while the sea rainbow steamed in the steamer will not affect the loss. Therefore, from the perspective of nutrient retention, steamed sea rainbow is better. But if you like to eat light sea rainbow, you can choose boiled sea rainbow, which tastes fresher. The shell of boiled sea rainbow is black, full of light and looks more appetizing.