What are the symptoms of Popeye?

One or both eyes bulge visibly, as if pushed out of the socket; Cloudy or whitish eye surface, with redness and bleeding around the eye in severe cases; A single bulging eye with good water usually points to injury; both eyes bulging suggests water quality or a systemic infection; Light-shy and hiding, missing food when it strikes, and swimming with poor orientation. It usually starts with: Elevated ammonia or nitrite continuously irritating the eye tissue; Eye injury from netting, fighting or transport; Bacteria invading the eye socket after prolonged poor water quality, often alongside a systemic infection; Being chased by tankmates or scratched by sharp decor.

How do you treat Popeye?

In order: 1. Test the water first, then change it (Test ammonia, nitrite and nitrate, then change 30-50% of the water with matched temperature. Water-quality popeye improves markedly within days to two weeks once the water is fixed.) 2. Isolate fish with single-eye injury (Move fish with injury-related popeye into a hospital tank to stop further nipping, and check the display tank for aggressive tankmates or sharp objects.) 3. Epsom salt bath (Use Epsom salt at about 1-2 g/L in the hospital tank for 5-7 days to support fluid balance in the eye and body cavity. This is magnesium sulfate, not table salt, and it affects plants and shrimp or snails.) 4. Antibiotics once a bacterial infection is confirmed (If the area around the eye reddens, cloudiness worsens, or both eyes deteriorate, use an antibacterial at the label dose in the hospital tank for a full 5-7 day course. The eye settles back gradually once the infection is controlled, so do not try to treat the eye itself.) 5. Observe for 1-2 weeks and screen for systemic disease (Popeye is often the outward sign of an internal problem: if a swollen belly, standing scales or wasting appear at the same time, treat the corresponding condition rather than only the eye.)

What medication treats Popeye?

Epsom salt (magnesium sulfate): Hospital tank bath at 1-2 g/L for 5-7 days. This is magnesium sulfate, not table salt, and the two are not interchangeable; it affects plants and invertebrates, so use it in the hospital tank only.; Antibiotics (oxytetracycline and similar): Hospital tank only, completing a 5-7 day course at the label dose. Antibiotics kill nitrifying bacteria, so dosing the display tank risks an ammonia rebound; stop UV and remove carbon during treatment.; Methylene blue: Hospital tank only, as a short bath at the label dose to control secondary infection around the eye. It affects plants and the biofilter, so change water and run activated carbon afterwards.

G-04 / 09FreshwaterMarine

Popeye凸眼病

Moderate. Injury-related cases often settle on their own and water-quality cases improve once the environment is fixed; both eyes bulging and worsening warrant suspicion of systemic infection or organ disease.

Illustration to come

G-04 / 09 · Popeye

SpecificationsDisease atlas

Cause: Bacteria
Severity: Moderate
Contagion: Low contagion
Corals / inverts: Not safe
Also known as: Exophthalmia、Bulging eyes

Symptoms

One or both eyes bulge visibly, as if pushed out of the socket
Cloudy or whitish eye surface, with redness and bleeding around the eye in severe cases
A single bulging eye with good water usually points to injury; both eyes bulging suggests water quality or a systemic infection
Light-shy and hiding, missing food when it strikes, and swimming with poor orientation

Typical triggers

— Elevated ammonia or nitrite continuously irritating the eye tissue
— Eye injury from netting, fighting or transport
— Bacteria invading the eye socket after prolonged poor water quality, often alongside a systemic infection
— Being chased by tankmates or scratched by sharp decor

Treatment, in order

1 · Water changeTest the water first, then change itTest ammonia, nitrite and nitrate, then change 30-50% of the water with matched temperature. Water-quality popeye improves markedly within days to two weeks once the water is fixed.
2 · IsolateIsolate fish with single-eye injuryMove fish with injury-related popeye into a hospital tank to stop further nipping, and check the display tank for aggressive tankmates or sharp objects.
3 · SaltEpsom salt bathUse Epsom salt at about 1-2 g/L in the hospital tank for 5-7 days to support fluid balance in the eye and body cavity. This is magnesium sulfate, not table salt, and it affects plants and shrimp or snails.
4 · MedicationAntibiotics once a bacterial infection is confirmedIf the area around the eye reddens, cloudiness worsens, or both eyes deteriorate, use an antibacterial at the label dose in the hospital tank for a full 5-7 day course. The eye settles back gradually once the infection is controlled, so do not try to treat the eye itself.
5 · ObserveObserve for 1-2 weeks and screen for systemic diseasePopeye is often the outward sign of an internal problem: if a swollen belly, standing scales or wasting appear at the same time, treat the corresponding condition rather than only the eye.

The standard treatment uses copper or formalin, which is lethal to corals, shrimp, snails and everything on live rock. Treat in a quarantine tank only, and leave the display tank fallow for the full period above before returning the fish.

Medications and cautions

Epsom salt (magnesium sulfate): Hospital tank bath at 1-2 g/L for 5-7 days. This is magnesium sulfate, not table salt, and the two are not interchangeable; it affects plants and invertebrates, so use it in the hospital tank only.
Antibiotics (oxytetracycline and similar): Hospital tank only, completing a 5-7 day course at the label dose. Antibiotics kill nitrifying bacteria, so dosing the display tank risks an ammonia rebound; stop UV and remove carbon during treatment.
Methylene blue: Hospital tank only, as a short bath at the label dose to control secondary infection around the eye. It affects plants and the biofilter, so change water and run activated carbon afterwards.

Prevention

Keep ammonia and nitrite undetectable so the eyes are not chronically irritated
Remove sharp decor and use a soft net when handling fish
Avoid keeping aggressive fish together and isolate bullied individuals promptly

Frequently asked questions

What are the symptoms of Popeye?: One or both eyes bulge visibly, as if pushed out of the socket; Cloudy or whitish eye surface, with redness and bleeding around the eye in severe cases; A single bulging eye with good water usually points to injury; both eyes bulging suggests water quality or a systemic infection; Light-shy and hiding, missing food when it strikes, and swimming with poor orientation. It usually starts with: Elevated ammonia or nitrite continuously irritating the eye tissue; Eye injury from netting, fighting or transport; Bacteria invading the eye socket after prolonged poor water quality, often alongside a systemic infection; Being chased by tankmates or scratched by sharp decor.
How do you treat Popeye?: In order: 1. Test the water first, then change it (Test ammonia, nitrite and nitrate, then change 30-50% of the water with matched temperature. Water-quality popeye improves markedly within days to two weeks once the water is fixed.) 2. Isolate fish with single-eye injury (Move fish with injury-related popeye into a hospital tank to stop further nipping, and check the display tank for aggressive tankmates or sharp objects.) 3. Epsom salt bath (Use Epsom salt at about 1-2 g/L in the hospital tank for 5-7 days to support fluid balance in the eye and body cavity. This is magnesium sulfate, not table salt, and it affects plants and shrimp or snails.) 4. Antibiotics once a bacterial infection is confirmed (If the area around the eye reddens, cloudiness worsens, or both eyes deteriorate, use an antibacterial at the label dose in the hospital tank for a full 5-7 day course. The eye settles back gradually once the infection is controlled, so do not try to treat the eye itself.) 5. Observe for 1-2 weeks and screen for systemic disease (Popeye is often the outward sign of an internal problem: if a swollen belly, standing scales or wasting appear at the same time, treat the corresponding condition rather than only the eye.)
Is Popeye contagious, and how urgent is it?: Contagion: low contagion. Severity: moderate. Cause: bacteria. Moderate. Injury-related cases often settle on their own and water-quality cases improve once the environment is fixed; both eyes bulging and worsening warrant suspicion of systemic infection or organ disease.
What medication treats Popeye?: Epsom salt (magnesium sulfate): Hospital tank bath at 1-2 g/L for 5-7 days. This is magnesium sulfate, not table salt, and the two are not interchangeable; it affects plants and invertebrates, so use it in the hospital tank only.; Antibiotics (oxytetracycline and similar): Hospital tank only, completing a 5-7 day course at the label dose. Antibiotics kill nitrifying bacteria, so dosing the display tank risks an ammonia rebound; stop UV and remove carbon during treatment.; Methylene blue: Hospital tank only, as a short bath at the label dose to control secondary infection around the eye. It affects plants and the biofilter, so change water and run activated carbon afterwards.
Is the treatment for Popeye safe for corals and inverts?: No. The standard treatment (copper or formalin based) is lethal to corals, shrimp, snails and everything on live rock. Treat in a quarantine tank only, and leave the display tank fallow for the full period given above.