What do you do when a fish lays on its side?
Robert Miller
Updated on April 12, 2026
If you find your fish floating on its side, not feeding it for three or four days can often solve the problem as the fish's body recovers from the gorging and rights itself again. Feeding crushed green peas can help alleviate constipation, which in turn will help the fish's
swimbladder
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ that contributes to the ability of many bony fish (but not cartilaginous fish) to control their buoyancy, and thus to stay at their current water depth without having to expend energy in swimming.
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What does it mean if a fish is lying on its side?
Swim bladder disorder is a condition when the swim bladder isn't working properly due to various possible factors. A swim bladder is a gas-filled internal organ that helps a bony fish maintain its buoyancy. The disorder refers to a collection of issues affecting the swim bladder, rather than a single disease.How do you save a dying fish?
Follow these steps for the best chance to save your sick fish.
- Step 1: Check Your Water Quality. Poor water quality is the #1 cause of illness and disease in fish. ...
- Step 2: Fix Your Water Quality. ...
- Step 3: Check Your Fishes' Food. ...
- Step 4: Call Your Veterinarian About Your Sick Fish.
Why is my fish laying at the bottom of the tank on its side?
When the water temperature inside your aquarium drops too low, your fish might lay motionless at the bottom of the tank to conserve energy. On the opposite spectrum, if the water temperature rises dangerously high, fish will stay on the bottom because that's where oxygen levels will be higher.Why is my fish on its side 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.HOW TO identify and treat SWIM BLADDER
How do I know if my fish is dying?
Loss of appetite. 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.Can salt save a dying fish?
Aquarium and Epsom salts are very beneficial to your fish. You can use any salts to clear any wastes or toxins from your fish body and revive it. These salt baths are best when the fish has overfeeding issues or mild infections. Make Epsom salt bath as recommended, and your fish will survive.Does putting a fish in the freezer revive it?
Certain species of fish do survive in frozen or near-freezing temperatures, during what is called an “overwinter” by the NOAA. They will go dormant, often burrowing into sand or hovering in large groups, and “revive” when the water warms up or thaws.Can swim bladder recover fish?
There's no treatment as such, and if the fish can recover, they will do so given a few hours. Switching the tank lights off for a while often helps, partly by removing one source of stress, but also by encouraging the fish to rest quietly rather than try to swim about.Should I euthanize my fish with swim bladder?
Removing and euthanizing infected fish promptly will minimize the chances of healthy fish becoming sick. Fish with poorly developed swim bladders (“belly sliders”) and deformed spines are particularly common among inbred fish, such as some fancy livebearers.Does Epsom salt help swim bladder?
You can use Epsom salt to treat things like Dropsy or Swim Bladder Disease.How do you save a fish that is upside down?
Add some aquarium salt (one teaspoon per gallon) to de-stress the fish. You can buy aquarium salt online or at pet stores. Try a specific swim bladder treatment. Try a treatment for bacterial infection such as API Melafix.How do goldfish act when they are 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.