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INTERNAL PARASITE IDENTIFICATION GUIDE
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📌 How to recognize internal parasites in fish
🔹 Common Symptoms of Internal Parasites
- 🏋️ Weight Loss Despite Eating – Often tapeworms or roundworms.
- 💩 Stringy White or Clear Feces – Intestinal distress (Hexamita, Capillaria).
- 😟 Swollen Belly (Not Dropsy) – Possible worms or protozoa.
- 🏊 Erratic Swimming / Head Standing – Neurological effects.
- 🍽️ Loss of Appetite & Lethargy – Advanced infections.
🩸 Tapeworms (Cestodes)
- 📍 Signs: Weight loss despite normal eating.
- 🔍 Identification: Segments in feces or emerging from the anus.
- 🏥 Treatment: Praziquantel (PraziPro), Fenbendazole.
🩸 Roundworms (Nematodes – Camallanus, Capillaria)
- 📍 Signs: Red worms protruding from the vent; weight loss.
- 🔍 Identification: Wriggling red worms near the anus.
- 🏥 Treatment: Levamisole, Fenbendazole, Flubendazole (medicated food).
🦠 Hexamita / Spironucleus (“Hole-in-the-Head”)
- 📍 Signs: Pitting holes on head, color loss, weight loss.
- 🔍 Identification: White stringy feces, lethargy, sunken belly.
- 🏥 Treatment: Metronidazole (Metroplex), garlic-infused food.
🪱 Other Internal Parasites (Trematodes, Microsporidia)
- 📍 Signs: Weight loss, sluggishness, bloating.
- 🔍 Identification: Often requires microscopic exam.
- 🏥 Treatment: Praziquantel (trematodes), general dewormers.
⚠️ Prevention Tips
- ✅ Quarantine new fish for 3–4 weeks.
- ✅ Feed properly frozen, high-quality foods.
- ✅ Keep water parameters stable.