The term "Croaker" commonly refers to a type of fish, particularly those in the Sciaenidae family, known for their distinctive croaking sounds. These fish are often found in coastal waters and are popular among anglers due to their tasty flesh. Species like the Atlantic croaker are recognized for their silver bodies and can grow up to 18 inches long. In a different context, "Croaker" can also refer to a slang term for a doctor, particularly in military settings. This usage highlights the informal and sometimes humorous way that service members refer to medical professionals, reflecting camaraderie and the unique culture within the military.