What is the difference between free radicals and lone pair electrons?

Free radical is an atom or group of atoms containing at least one unpaid electron and existing  for a brief period of time before reacting to produce  a stable molecule.

lone pair electrons means that those electrons which do not participate in chemical bonding and bonding pair means the electrons which involves in the chemical bonds formation. 

In some developing nations the percentage of the animal protein from fish in the diet can be as high as 25 percent.  about 85% of fish caught is used for human consumption.  the remainder is converted into fishmeal and fish oil.