very cool nice fluid movement i freaking adore kois here in argentna we have a place called japanese garden it was buit for an important japanese person some years ago and the have lotsa kois in a lot of different sizes (some are more like whales than fishes XD) and colours they are soooo awsomee, well anyway good luck on the contest ^^
Cool minimalist approach! The ripples remind me of speakers, and the trailing lines remind me of a music sheet, which adds a whole new sensory element to the piece. I also like how their fins and the edges of their bodies are translucent. That's a very cool fishy element. Nice job on their patterns and good luck in the contest!