I personally think its wrong eating an animal you call your pet and take responsibility for, but I def. wouldn't condemn anybody for doing so. To each his/her own. If you eat your pet fish, then fine.
In brazil, I think that instead of chicken eggs, they eat turtle or tortoise eggs as a staple near the coast. just a little tid bit.
I wouldnt eat my fish though. Unless they were huge and meant as food.