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Fat Sleeper Goby - (Dormitator maculatus)

Fat Sleeper Goby - (Dormitator maculatus)

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Fat Sleeper Goby - (Dormitator maculatus)
Fish Details, Description and Information Below:

🐟 Fat Sleeper Goby (Dormitator maculatus)

The Fat Sleeper Goby is a large, hardy, and adaptable brackish-to-freshwater fish found in coastal streams, estuaries, and lagoons across the Americas. Known for its robust body and mottled pattern, it is a stealthy predator with a calm demeanor when housed with appropriate tankmates.


🔍 Quick Facts

  • 🆔 Common Name: Fat Sleeper Goby
  • 🧬 Scientific Name: Dormitator maculatus
  • 🧬 Family: Eleotridae
  • 🌎 Origin: Coastal regions of North, Central, and South America
  • 📏 Max Size: 24 inches (61 cm)

🕊️ Behavior & Temperament

  • 🐟 Generally peaceful but predatory toward smaller fish
  • 🌙 Often rests on the substrate, “sitting” like a sleeper
  • 🏞️ Highly adaptable—tolerates both fresh and brackish water
  • 🐠 Best kept with similarly sized, non-aggressive tankmates

🏡 Tank Requirements

  • 🛁 Minimum Tank Size: 125 gallons for adults
  • 🪵 Sand or fine gravel substrate
  • 🌱 Driftwood, rocks, and hiding places recommended
  • 💨 Moderate water flow with strong filtration
  • 🌊 Can be kept in freshwater or low-end brackish setups

Water Parameters:

  • 🌡️ Temperature: 20–28°C (68–82°F)
  • ⚗️ pH: 6.5–8.0
  • 💧 Fresh to low brackish salinity

📊 Overview Table

🏷️ Feature 📋 Details
🆔 Common Name Fat Sleeper Goby
🧬 Scientific Name Dormitator maculatus
🌍 Origin Coastal Americas
📏 Max Size 24 inches (61 cm)
🕊️ Temperament Peaceful but predatory
🛁 Tank Size 125+ gallons
⚗️ pH Range 6.5–8.0
🌡️ Temperature 68–82°F (20–28°C)
🍽️ Diet Carnivorous—shrimp, fish, worms, pellets
🐠 Ideal For Large freshwater/brackish aquariums

📝 Snippet

The Fat Sleeper Goby (Dormitator maculatus) is a large, adaptable predator that thrives in both fresh and brackish environments. Its calm nature with similarly sized tankmates makes it a unique choice for large aquarium setups.

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