Omega 3
fish meat is having good nutrual oil carbohydrates proteins and still more.
the main nutrient of apple is Carbohydrate.
The main nutrient in Oranges is Vitamin C.
iron
The energy for the plants in a fish tank is supplied by Light.
the electricity supplied to a house
Fish was the main source of protein in U.A.E. in the olden days & not camel milk as fish provides more nutrient than camel milk as it provides more nutrients & protein than camel meat. The taste of fish is better than camel meat. Also as it is the national animal of U.A.E.
water
Protein.
Carotene
my bum
Phosphorus is the main limiting nutrient in freshwater environments, whereas nitrogen is the main limiting nutrient in saltwater environments.