That's right I actually think they are the best top view goldfish with their swimming and flowing fins - so cute and yet so beautiful.
Whenever I have free time I'm always sitting admiring my black butterfly while it's swimming in the tub - it's such a cutie even though it's fins isn't as beautiful as those above [it's got the Ryukin body though!].
Your butterfly Happybuddha is also gorgeous - do you guys find many butterflies in fish stores in SG? We just rarely get black ones or otherwise I never cought any!