Writers win five Steem! The November 13th Twenty-four hour short story contest--A little boy gets a new fish for his aquarium that keeps growing and growing.

This is the subject of your story:
Juan Diego waited with joy for his seventh birthday because he dreamed that they would give him a small octopus for his big fishbowl.
Juan felt so much emotion that he could not sleep all night, dreamed of his octopus or any other marine animal to complete his collection, got up early and ran to wake his parents and grandfather to give him their gifts.
His mother gave him a beautiful scarf, his father a car track and his grandfather, an old sailor who had participated in the Falklands War, gave him a crystal box where there was a beautiful multicolored fish.
Juan Diego saw the gifts with reluctance, it was not what he expected, then began to cry with sadness, the best day of the year had become a disaster because it was not what he wanted.
Then his grandfather took him by the hand and took him to the fish tank to place his new fish in the fish tank, at that moment his grandfather asked him to sit on his legs to tell him the origin of that beautiful fish.
Being a day's journey near the Malvinas Islands, we saw at a distance what looked like a school of fish, but as we approached we realized that although there were several fish, they were not as many as those forming a school, what happened was that this group of fish by their multiple colors and their special brightness, caused a visual effect that made believe that they were very numerous and was not so.
Everyone on the boat wanted to have one and we proceeded to use the net to catch them and so we placed it in buckets full of sea water, to keep them alive and have them as pets.
But when night came something happened that nobody expected, those fish grew unexpectedly and came out of the buckets, watered all over the ship was so rare their growth, that all the crew began to fear that the ship would unite with us inside, its multicolors became ash color and a long tail accompanied them,
As I was able to reach the lifeboats and submerged myself in the sea, the fish jumped with force until they managed to sambuirse, in the sea they returned to make the beautiful fish that we had seen in the morning.
When I reached the shore, I realized that I had managed to take one in my hands, which I always kept in my boat and today I give you, one of the most beautiful creatures of the sea, you only have to take care that it remains in the sea water, so your fish tank should only have sea water, if you do not want to happen what happened that night I tell you.
The boy then looked at his grandfather with rejoicing, now if he wanted to have that little fish in his tank.