Koi are a popular type of fish kept in ponds and aquariums. They are known for their bright colors and patterns, and many people enjoy watching them swim.
However, koi can sometimes exhibit a behavior known as “flicking,” which can be frustrating for owners. There are a few possible reasons why koi may flick, and understanding the cause can help resolve the issue.
Why do my pond fish keep flicking?
The movement of fish in ponds and rivers is usually done through their gills. When the fish take a breath, the air enters their mouths and they expel the water through their gills.
This water flow is used to move them upstream or downstream. In a pond, the water flow is also used to circulate the fish.
When the fish move, they cause the water to ripple and this makes it look like they are “flicking.”
What does koi flashing look like?
Koi flashing is a behavior exhibited by some koi in which they rapidly swim forward, sometimes bumping their heads on the surface of the water. It is typically seen as a display of excitement or aggression, and is usually followed by a few seconds of rest.
Your koi may be flicking because they are trying to get rid of a parasite. If you see your koi scratching themselves on rocks or other surfaces, it is likely that they have a parasite.
You can treat parasites by adding a parasiticides to your pond.