Grenadier is the general name used for deepwater marine fish species in the family Macrouridae, the rattails, having a distinct body shape with a long slender body and large head. The most important commercial species are in the genera Macrourus and Coryphaenoides, harvested by deep-sea trawling for their mild white flesh. Slow growth makes these stocks vulnerable to overfishing, requiring careful quota management. Processed at sea or on landing, the flesh is delicate and best used in fillets, fish cakes and surimi-style products rather than long cooking.