Fish Protein stand first

The protein in fish contains sufficient amounts of all the essential amino acids required by the body for growth and maintenance of lean muscle tissue. The protein in fish as well as similar foods of animal origin make up complete protein sources.
The protein source can be important to lose weight because high quality proteins such as the protein in fish can be used to maintain an active metabolism. Low quality protein does not contain all essential amino acids required for use in protein synthesis and means the protein must either be used for energy or converted to fat.
If someone follows a calorie restricted diet there is less chance the protein will be converted to fat but more protein used for energy means less fat is used from fat stores resulting in slow weight loss progress!
Concl: The fish protein stands first among all the meat and dairy products