>>104191297
You're clearly obsessed with dogs. Do you expect aquariums to just let their rare expensive tourist attractions fend for themselves against any health issues?

https://www.youtube.com/watch?v=EQunLEYgjKU
https://nextdaykoi.com/koi-fish-facts/what-is-a-fish-veterinarian
https://www.sgu.edu/school-of-veterinary-medicine/blog/what-does-aquatic-veterinarian-do/
https://www.theaquariumvet.com/
https://fishvets.org/