What Does White Spot Look Like on Koi

Often referred to as Itch or Ick, White spot is caused by the Ichthyophthirius parasite. Parasites are naturally present in your pond and in small numbers will usually be controlled by the immune system of your fish.

What causes white spot on koi?

Often referred to as Itch or Ick, White spot is caused by the Ichthyophthirius parasite. Parasites are naturally present in your pond and in small numbers will usually be controlled by the immune system of your fish.

What does white spot look like on pond fish?

Ich: Also known as the white spot disease, often infects fish when they are under a lot of stress caused by pH fluctuations or rapid temperature changes. Along with flashing, fish can be seen at the surface gasping for air with clamped fins and pinhead white spots that look like white grains of sand all over.