actually saintanger is WRONG, im sorry but this sort of thing is NOT something that should make it to a court (provided you can find a lawyer willing to take it on) because then you make a mockery of REAL cases for things much worse then a fish like loosing limbs or being unable to walk ever again
i understand to some a fish is important but in all honestly NOT important enough for a case and if you did go ahead with one and lost then court costs from the other side are yours to pay, though your lawyers might charge you as well unless its covered under the 'no win no pay' banner
too many people today see dollar signs on everything, we are becoming worse litigants then the yanks