The problem is how do we dispose of the remains when a creature has died.
Normally, if you happen to have a small pet like a budgie or a hamster or such like, and it dies on you, the thing to do is to bury it in the garden and say a little prayer. It's a simple and perhaps gentle way to introduce young ones to the inevitability that we all die. You tell them that their budgie is now in Heaven where mirrors are bigger and never get dirty and you never have to clean the cage because in Heaven budgies no longer poo. Or their hamster is in Heaven enjoying the biggest wheel he could ever imagine.
If it is the goldfish that dies the simple way is to flush it down the toilet and say that it has now gone to a watery Heaven were water never needs to be changed and the tank is as big as eternity itself. Or lies to that effect.
A word of warning however: never try to flush large items down the toilet. I tried it with a dead cat once and we had the biggest blockage you could imagine. Cost us a lot in plumbers' fees.
Whatever you do; death must be treated with dignity at all times.
I remember once I went to the funeral of a friend of mine who throughout life was a clown at the local circus. When he died, they dressed him up in his clown outfit and painted his face just as he always looked when performing; big smile and all.
Although dignified in appearance, unfortunately his funeral was not so in execution. When they drove him to church the hearse he was in kept honking every few minutes, the engine went "bang" every now and then, the doors fell off, the steering wheel came off in the hands of Coco the clown driving it, and smoke came out the back.
When they laid him in his coffin they could not put the lid on because his big feet protruded upright from the box.
The funeral cortège consisted of other clowns following him, as well as an elephant, a zebra, a juggler juggling and a half-naked woman carrying a large python amongst other circus type people.
At the cemetery, when they lowered him into the ground, he kept popping up and down like a toy clown in a box.
Most people, of course, decide that when they die they will either be buried or cremated. Some decide to leave their bodies to science or donate their organs; which is a generous and laudable thing to do. Others prefer to be buried at sea. Whatever is decided it is always done in a dignified way.
How about being somewhat adventurous, however, and have a memorable funeral? Like being catapulted at speed from a mountain top and far away into the sea? Or being tied to a strong elastic band and bounced up and down from a platform into a shark infested pool? Inventive and very memorable I should say.
And one more last thing. When you get to meet Our Lord, as surely you will, take with you a book of jokes to put Him in a good mood before He pronounces on your fate.
Finally ... here's a short video I made which treats this whole subject with real dignity.