Why is my koi swimming vertically?

Koi that swim sideways may be performing this motion to try to rid themselves of parasites on their scales and gills, such as skin/gill fluke worms. Swimming Upside Down behaviour is often the most serious symptom when it comes to swimming behaviour, as this often indicates a problem with the koi’s swim bladder.

Why are my fish swimming vertically?

A fish swimming vertically, nose-down, can mean one of two things. A few species of fish do this as part of their normal behavior. However, more often than not, a fish swimming at odd angles indicates issues with the swim bladder. Swim bladder problems have a host of causes.

Why is my koi hiding?

One of the main reasons is because it’s a self-defense mechanism. When people are scared, they either fight or run and hide. Fish aren’t known for their fighting skills, so they hide instead. By hiding, your koi fish are protecting themselves from some form of danger, including new ponds.

Why is my fish swimming sideways after water change?

The impaired buoyancy in fish is caused by a malfunction of their swim bladder. When affected by Swim Bladder Disorder fish will often lose the ability to properly swim. In some cases the fish will lay upside down or sideways on the bottom, unable to swim upwards.

What causes swim bladder problems in Koi?

For 99\% of koi, poor water quality is the cause of swim bladder disease.

How long do koi hide?

1) Newly Introduced Fish In both cases the fish have just had a huge change in environment, and this can be quite traumatic to both koi and goldfish. After adding a new fish to your pond, it’s actually very common for them to hide and act shyly for a few days while they slowly begin to explore their surroundings.

Why is my fish swimming straight up and down?

Fish exhibit many behaviors that tell us how they are feeling, and glass surfing (also known as pacing) is one of them. This is when fish constantly swim up and down the sides of the aquarium glass. One reason they do this is stress. It could mean they aren’t happy in their environment, for one reason or another.