Pinecone appearance / raised scales
This looks like: dropsy - swelling from fluid inside the body cavity; prognosis is often serious
Why this happens
Kidney and organ stress from fluid retention make scales lift like a pinecone - it is a symptom bundle, not one universal cure.
What to do right now
- Test ammonia/nitrite first - fix any poison immediately.
- Isolate in mature hospital water if you can - calmer, medicate less stressfully.
- Research species-sensitive antibiotics with a vet-minded guide - community meds vary by region availability.
- Clove oil euthanasia is humane if fish cannot balance - learn method soberly before crisis hour.
- Decide early: aggressive treat vs palliative comfort - limping along sometimes hurts more.
What not to do
- Don't assume peas cure kidney-driven dropsy - that targets constipation in a different organ story.
Stop it happening again
Keep nitrate low with regular water changes, avoid chronic stress and overfeeding, and quarantine new fish - dropsy is usually the end of a long internal problem.
If that doesn't fix it
If one of many, test source tank water weekly for a month.
Catch this earlier next time - log your water parameters in App-aquatic. Free forever.
This isn't veterinary advice - it's a directional read to help you decide your next step, based on the most common causes. We can't see your fish, so pair it with a liquid test kit and clear photos, and see an aquatic vet or a trusted local fish shop for a valuable or seriously ill fish.