Help! I got a fish with a tail bent upwards. How can I help him? : r/Koi

Why do the Koi Fish Tails Bleed - Cause And Cure - hygger

Fin Rot in Aquarium Fish

Pond Fish Anatomy, What You Need to Know

My betta fish is pretty active, but his tail and fins are not really open wide. Is this normal? - Quora

Goa (Baga/Arpora) Report 12 - 19 Jan 2020

Bent tail

Treating ich with formalin and malachite green, one koi got a bent spine and has since died (help) : r/Koi

Will a goldfish's dorsal fin regrow? - Quora

Koi swimming bent : r/Koi

Causes of Bumps on Goldfish: Identifying Worrisome Bumps - Fish Vet