🐠 Redtail Catfish (Phractocephalus hemioliopterus) – Full Guide

📌 Quick Overview

🔍 Identification

• 🟥 Tail: Bright red or orange caudal fin (main identifying feature)

• ⚫ Body: Dark grey to black upper body

• ⚪ Belly: Creamy white

• 👃 Barbels: Long whiskers (sensory organs)

• 🦈 Shape: Streamlined, torpedo-like body with a large flat head

🧠 Behavior & Temperament

⚠️ Will eat fish, invertebrates, and even decorations if small enough!

🏠 Tank Requirements

🚨 Redtail Catfish outgrow most home aquariums FAST — juvenile in a 55-gallon may grow to 2 feet in under a year.

🥩 Diet

Redtail Catfish are carnivorous omnivores — they eat everything.

✅ Ideal Foods:

• 🐟 Whole fish (feeder fish only if quarantined properly)

• 🐛 Earthworms, bloodworms, nightcrawlers

• 🍤 Shrimp, squid, mussels

• 🍗 Chopped chicken hearts or tilapia (sparingly)

• 🥫 High-quality carnivore pellets

• 🍽️ Prepared foods (catfish sticks, meaty sinking pellets)

⚠️ Avoid:

• ❌ Goldfish/feeders from pet stores (risk of disease & poor nutrition)

• ❌ Fatty red meats (damage liver/kidneys over time)

• ❌ Overfeeding – RTCs are prone to obesity and bloat

🧑🤝🧑 Tankmates

⚠️ RTC Tankmate Rule: "If it fits in its mouth, it’s food."

✅ Possible Tankmates (ONLY in massive tanks or ponds):

• 🐋 Other large catfish (e.g., Tiger Shovelnose, Iridescent Shark)

• 🐊 Large predatory cichlids (Oscars, Peacock Bass)

• 🐟 Pacu or arowana (only if similar size)

• 🧱 Monster fish with equal size and aggression

❌ Should NOT be kept with:

• 🐠 Community fish – they will be eaten

• 🐚 Shrimp, snails, crayfish – food

• 🧼 Small bottom dwellers (Corydoras, Plecos) – eaten or injured

• 🧘 Docile or peaceful tankmates – will be bullied or devoured

🐣 Breeding

• 🔒 Breeding in captivity: Almost nonexistent outside of commercial fish farms

• 🧬 Sexing: No reliable method to sex visually

• 🪺 Spawning: Occurs in massive river systems during flooding season in the wild

⚕️ Common Health Issues

🧠 Fun Facts

• 🔥 Named for its striking red tail, which becomes more vibrant with age

• 🐘 Grows faster than most aquarium fish — up to 1 inch per week as juveniles

• 🧠 Can learn feeding schedules and recognize humans

• 🌊 Native to the Amazon Basin, one of the most biodiverse regions on Earth

• ⚠️ Can live up to 20+ years — a true lifetime commitment

📊 Quick Summary Table

⚠️ Redtail Catfish Warning for Beginners

🚫 Sold at just 2–3 inches in pet stores, but they grow into river monsters requiring:

• 🏗️ A tank the size of a bathtub or small swimming pool

• 💰 Large budget for filtration, food, and power

• 🧹 Constant maintenance and high waste removal

• 🧠 Expert care — not suitable for small tanks or casual hobbyists

Many RTCs are abandoned or die prematurely due to poor planning. Please research before buying.

IMAGES ARE FOR REPRESENTATIVE PURPOSES ONLY.