Why are my goldfish hiding all of a sudden?

Environmental Changes – Anything that alters a fish's environment can spook the fish into hiding. This can include sudden water changes, temperature shifts, pH changes or chemical imbalances. As the tank stabilizes at the optimum environmental conditions, the fish should lose their shyness and stop hiding as much.
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Why is my goldfish hiding and not eating?

Like any creature, a goldfish not eating can be expressing taste preferences or that he's tired of eating the same thing over and over. Fresh romaine lettuce, spinach, or kale kept in the tank in a vegetable clip can offer your fish forage like he'd find in the wild.
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What are the signs that a goldfish is dying?

Identify symptoms of a dying goldfish.

The best time to check for signs of disease or death is before feeding. Breathing disorders: look for symptoms such as gasping for air, rapid breathing, skimming the surface of the tank water, or lying at the bottom of the tank, which may indicate disease or poor quality water.
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How long do goldfish hide for?

Generally, this behavior will only last a few days, but can be prolonged if the fish is constantly stressed and has no “safe space” to retreat to. Funnily enough, one of the better ways for a new fish to grow in confidence is to make sure they have a place to hide!
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Why can't I see my goldfish?

Fish can also become skittish and hide after water changes. Any change to their environment - like the water quality, pH level, or oxygen level - can cause them to stress, and when they stress, they may retreat to their favorite hiding spots.
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Why Fish Hide and What To Do About It



Is it normal for fish to hide?

Hiding Fish: Hiding is completely natural behavior for most fish, especially when they are first introduced to their new aquarium. Just make sure you keep your fish comfortable and healthy, and he should start coming out of hiding more readily.
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What does a sick goldfish look like?

Weakness or listlessness. Loss of balance or buoyancy control, floating upside down, or 'sitting' on the tank floor (most fish are normally only slightly negatively-buoyant and it takes little effort to maintain position in the water column) Erratic/spiral swimming or shimmying.
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Why is my goldfish just laying on the bottom of the tank?

Usually goldfish sit at the bottom of the tank due to not feeling well for some reason. Improper water conditions, parasites, stress, GI problems, and swim bladder problems can all cause a fish to sit at the bottom of the tank.
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What kills goldfish in a tank?

Chlorine and chloramine are additives in tap water that can kill goldfish as well. These get into your tank if you perform water changes and add untreated tap water to your tank. You should always use chemical additives that remove chlorine and chloramine from water before you add it into your tank.
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Why do my fish stay in one corner of the tank?

Heat. While most quality aquarium heaters are good at disbursing heat in such a way that the water stays at a constant temperature, you may find fish hanging out on one side of the tank rather than another because they prefer the temperature.
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Do fish hide when they are pregnant?

Nesting. It is completely normal for a pregnant fish to spend more time hiding or seeming to explore plants and decorations in the aquarium. This is an indicator that she is coming close to giving birth, and that she is looking for a place to go through the process.
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Why is my fish burying itself?

The fish tends to get active a night, and sleeps during the day. To protect himself from predators while he sleeps, the weather loach buries himself in the rocks to hide. This fish will learn to come out during feeding time, regardless of the time of day.
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Do goldfish like hiding places?

Many aquarium fish do not feel secure unless they have a place where they can hide when they feel threatened. Having a lack of hiding spaces within your fish tank can often lead to your fish becoming stressed, which is definitely not what you want. Giving your fish appropriate hideaways is a win-win situation.
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Where do my fish disappear to?

They will hide most of the time and can find some very creative out-of-the-way spots. They will wedge themselves under rocks, behind decorations, within clumps of plants, even bury themselves in the substrate. So, before you assume the missing fish has vanished for good, closely inspect everything in the aquarium.
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How long does it take for a new fish to come out of hiding?

Your Aquarium: 5 – 15 Days After Setup:

Your new fish may hide at first. They are likely stressed from being moved from the store and placed in a new environment. Make sure you have plenty of cover and hiding places to make them feel safe and secure.
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Why is my goldfish laying on its side and not moving?

If your goldfish is lying on its side at the bottom of the tank, then it could be due to a few things. It's most likely going to be swim bladder disease, dropsy, or constipation. Unfortunately, if it's dropsy, there's not much you can do, and the chances of recovery are slim.
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Why is my fish not moving but still alive?

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. They will float uncontrollably to the top of the aquarium, turned upside down, while still being alive.
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How do you know if a goldfish is happy?

Your fish are happy and healthy when they:
  1. Swim actively throughout the entire tank, not just hanging out or laying at the bottom, floating near the top or hiding behind plants and ornaments.
  2. Eat regularly and swim to the surface quickly at feeding time.
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Why is my goldfish staying at the top of the tank?

A fish may linger near the surface because he's trying to breathe more easily. Remember, fish breathe dissolved oxygen—not oxygen that is already combined in the H2O molecule. Naturally, these dissolved oxygen levels tend to be higher near the surface, where interaction between air and water takes place.
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How do I know if my fish has ammonia poisoning?

Symptoms include:
  1. Purple, red or bleeding gills.
  2. Fish may clamp, may appear darker in color.
  3. Red streaking on the fins or body.
  4. Fish may gasp for air at the surface of the tank water.
  5. Torn & jagged fins.
  6. Fish may appear weak and lay at the bottom of the tank.
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Can goldfish get depressed?

It turns out that not only can our gilled friends become depressed, but some scientists consider fish to be a promising animal model for developing anti-depressants.
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How can you tell if fish are stressed?

Strange Swimming: When fish are stressed, they often develop odd swimming patterns. If your fish is swimming frantically without going anywhere, crashing at the bottom of his tank, rubbing himself on gravel or rocks, or locking his fins at his side, he may be experiencing significant stress.
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Can a stressed fish recover?

Aquarium fish can become stressed by any number of things ranging from poor water quality to disease to changes in tank parameters. In some cases, mild stress is something your aquarium fish can recover from but, in many cases, it is an early sign of something that can become a major problem.
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