Frank, thanks for your post http://www.fivedoves.com/letters/march2012/frankm331-4.htm

By way of confirmation, Kat Kerr also documents and speaks about seeing something similar in her visits to Heaven.  There are several of her messages available for free on itunes .  Here are some links:
http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=315420105
http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewPodcast?id=349752363

Kat also mentions seeing people's pets in heaven.   She details a similar account to what you have mentioned about a gold fish, but I don’t believe its the same occurance.  She recounts how she was shown a mansion in which fish tanks were built through the walls leading to a swimming pool. There was a gold fish that could swim through the walls in the in-built tank through to the pool and even had a resting place or ledge where there was a picture of a boy, who was the pets owner, who was still alive on earth.  She recounts how she met the boy and his family who were overjoyed that the fish, whom the boy so loved, was waiting for his owner in the mansion God had prepared for him, when he arrived.

God loves us so much and has prepared a place greater than we could ask or think.

Love,

Ben.