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Black Spotted Eel - (Mastacembelus dayi)
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Black Spotted Eel - (Mastacembelus dayi)

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$85.00
Wild Caught
was $90.00 Save 6%
Price of shipping is not included.
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NORTH ARLINGTON,
United States
Aug 10, 2025
Wonderful service and selection
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Black Spotted Eel - (Mastacembelus dayi)
Fish Details, Description and Information Below:

🐍 Black Spotted Eel – (Mastacembelus dayi)

The Black Spotted Eel is a beautifully patterned spiny eel species, named for the scattered black spots covering its elongated, serpentine body. Native to freshwater habitats in Sri Lanka and southern India, this species is peaceful, intelligent, and enjoys hiding in the substrate during the day, becoming more active at night. Its striking appearance and calm demeanor make it a great oddball addition to large peaceful community or oddball tanks.


🌊 Tank Setup

  • 🏞️ Minimum 55–75 gallon tank
  • 🪨 Soft sandy substrate – they love to burrow
  • 🪵 Provide PVC pipes, caves, or rock crevices for hiding
  • 🌿 Live or artificial plants can help provide cover
  • 💧 Tight-fitting lid – escape artists!

🍽️ Diet

  • 🍤 Carnivore – loves live or frozen foods
  • 🐛 Feed bloodworms, blackworms, brine shrimp, chopped earthworms, krill
  • 🍽️ Will learn to take pellets or carnivore sticks over time
  • 🕓 Best to feed in the evening or at night
  • 🐟 Give your fish the best with the same high-quality nutrition we use every day! 🐟 At Jason’s Plecos & Cichlids, we feed a balanced mix of protein-rich and vegetable-based fish foods to keep our plecos, cichlids, and other tropical fish healthy, active, and thriving. These premium fish foods are specially formulated to enhance natural color, promote strong growth, and support long-term health—making them a trusted choice for aquarium hobbyists worldwide.
    • Fluval Bug Bites Pleco Formula
    • Fluval Bug Bites Tropical
    • Hikari Massivore Delight
    • Hikari Massivore Delight
  • 🐟 By purchasing through these links, you not only provide your fish with top-quality nutrition but also help support our mission to bring hobbyists the best in fish care. ✨ Click the links above to shop now and give your fish the nutrition they deserve! We earn a small commission for each sale.

⚖️ Temperament

  • 🕊️ Peaceful and shy – not aggressive
  • 🐟 Safe with medium to large peaceful tankmates
  • ⚠️ May eat very small fish or inverts if they fit in its mouth
  • 🧠 Smart and curious – can recognize routine and keepers

🧠 Behavior & Care

  • 🌙 Nocturnal – hides during the day, explores at night
  • ⛏️ Likes to dig – soft sand is a must
  • 🔒 Escape-prone – always secure the tank lid

📋 At a Glance

🔖 Scientific Name Mastacembelus dayi
🐠 Common Name Black Spotted Eel
🌎 Origin India & Sri Lanka
📏 Size Up to 16–20 inches (40–50 cm)
🌡️ Temperature 75–82°F (24–28°C)
💧 pH Range 6.5–7.5
🐟 Temperament Peaceful / Shy
🏠 Tank Size 55+ gallons
🍽️ Diet Carnivore
🎯 Experience Level Intermediate

💡 The Black Spotted Eel is a low-key oddball with loads of personality. Its spotted pattern and calm nature make it a great addition to peaceful tanks — just be sure to offer plenty of hiding spots and a secure lid!

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