How do you tell them apart?
What if you've got twins or triplets living in the pond?
( Neptune A dole queue dosser and foul mouthed chav., Tue 26 May 2009, 10:54, archived)

scale patterns are faily unique

( mongychops, Tue 26 May 2009, 10:55, archived)

and they laminate the fish with their name on them.

( Donkey Gums @mattcomedy, Tue 26 May 2009, 11:02, archived)