So, you buy a new fish. You get it home and you want your fish to do well. So you gets the animal used to the water propery and you put it into your tank.
Now the fish goes straight into hiding. It doesn’t come out. Immediately many people will begins to panic.
Something’s wrong with the tank, they’ll reason. Or the fish are sick. And because of this, a lot of new fish keepers will starts looking at what they did wrong.
What mistakes were they making? Did they miss a step in the setup proces? Unless there is something wrong, the situation is normal and not dangerous.
Understanding Why New Fish Hide In Tank
Understanding New Fish Hiding Behavior
Why does the fish act like that? It act that way because it is cautious. It’s not unhappy.
It’s not broken. Knowing this will change your response. Don’t move the decorations.
Don’t treat for a disease. Give the animal some time. The best thing you can do are be patient.
Stress Response and Environmental Changes
This is a stress behavior. It’s something that happens to the fish that you can’t necessarily perceive. Moving to a different environment put their body on high alert.
It goes into some type of defense mode. This isn’t shyness, it’s a bodily response. What if the water is different than what was in the bag?
Maybe the lights are more intense then they were at the store? The sounds around your house is unfamiliar to the fish. All of these thing cause the fish to feel exposed, so it reacts by hiding.
Imagine being somewhere new. Would you walk into the center of your new home and wave to your neighbors? No, you’d wait in one room until you had an idea of where all the doors is located.
Fish do the exact same thing. In the wild, open water are scary. Plants and rocks is safe spots.
That’s why the fish hides until he gets comfortable with where he is.
Territorial Behavior from Established Tank Mates
Another consideration is history of the tank. The water parameters is fine, but there is already established residents who has staked out their turf.
Established fish know where they’re at and where they feel comfortablty. They view new fish as an intruder. They might shows dominance without actualy chasing.
The group will just give the new guy the look from afar which cause the new guy to stay hidden. The best bet is for the new guy to wait.
Shy Fish Species and Adaptations
Certain fish species is naturaly shy.
Species such as corydoras catfish, gouramis, and bettas tends to be more covert. Such creatures has adapted to a habitat where visibility is limited (e.g., thick vegetation; dirty water). They’re not as aggressive as danios, for example, or tetras.
Try as you might, you cannot force them out into the open. When you feed them too early, they may burro further because they connect it with a threat. Let them come out when they feel comfortable.
Impact of Bright Lighting on Fish
Another frequently overlooked item is lighting. Typically, store tanks aren’t lit very brightly because it’s thought to be less stressful. In your own home you might have some bright lights on timers.
The sudden introduction of a lot of bright light are jarring to the fish. They hide in the dark corners and don’t come out until their eyes gets used to it. For some this could of take anywhere from hours to days.
Patience and Care During Adjustment Period
The solution is to do nothing. If possible, turn down the lighting on your main lights or even dim them. Leave your tank alone.
Stop looking through that glass. Your fish know when something approaches the water and to them it’s probably a threat. Feed the tank like normal but don’t try to feed the fish hiding out.
Let everything else go about its business. They’ll forget they’re afraid soon enough due to curiosity…and hunger. The wait allows the fish to trust you.
It comes out when it knows it’s safe, not because you made it. That is what safety is all about in an aquarium. Don’t force the fish into anything.
It’s acting on instinct to protect itself so let it hide. Allow it time to realize you aren’t going to harm it.
