I am very much into goldfish. I recently changed my 720 liter / 190gal into a goldfish tank and gave not regretted a sec
There are many types of fancy goldfish that I like but ranchu and yuanbao are my current favourites
Try searching the net for Yuanbao goldfish. You'll find some awesome examples. Then try ryunkin. They have taller bodies. Imo pearl scale golf balls and celestials is where the hobby has gone too far