The term "lean fish" is a culinary expression that refers to any type of fish that has been cooked with minimal seasoning or added fat, resulting in a dish that is low in calories and high in protein. Full definition
For example, a 2009 study suggests that it's easier to lose weight by making lean fish your main source of protein rather than lean meat. (ergo-log.com)
It's a rather lean fish from colder northern waters — definitely Primal. (paleodietnews.com)
Meal Three (11:30 - 12:30 Lunch) 1-1/2 cup of bown rice or medium sized baked potato, or sweet potato 2 cups of green beans, broccoli or any other desired vegetable 6 - 8 oz of chicken, turkey, or lean fish Supplements: Vitamin C (1000 mg) (hugorivera.net)