The Violet Goby (Gobioides broussonnetii), also known as the Dragon Goby or Eel Goby, is a captivating species admired for its elongated body, metallic violet-silver sheen, and prehistoric appearance. Reaching a mature size of 18–25cm, this goby is often mistaken for an aggressive predator—but in reality, it’s a peaceful, shy bottom-dweller best suited for large, brackish aquariums with plenty of hiding spots.

Native to the coastal estuaries and mangroves of the Americas, Violet Gobies are accustomed to muddy, brackish environments with low light, soft substrates, and minimal water movement. Their unusual look and calm demeanor make them a favorite for aquarists seeking something exotic, though they require specialized care and a brackish water setup to thrive long term.

🐠 Key Features:

• Scientific Name: Gobioides broussonnetii

• Common Names: Violet Goby, Dragon Goby, Eel Goby

• Size: 18–25cm (up to 38cm max in the wild)

• Temperament: Peaceful, timid, bottom-dweller

• Difficulty Level: Intermediate to Advanced

• Tank Zone: Bottom

• Best kept in brackish setups with soft substrate and hiding areas

🌊 Water Conditions (Brackish Setup Required)

The Violet Goby thrives in low-salinity brackish water, mimicking its estuarine habitat. Proper water conditions are critical for health and longevity.

• Temperature: 24–28°C (75–82°F)

• pH: 7.5–8.5

• Hardness: Moderate to Hard

• Salinity: 1.005–1.010 specific gravity (brackish)

• Tank Size: Minimum 55 gallons (larger preferred)

• Filtration: Gentle but efficient (can tolerate low oxygen)

• Substrate: Fine sand or mud-like for burrowing

• Decor: Caves, PVC pipes, driftwood, dim lighting

Avoid sharp décor, as their delicate bodies and poor vision make them prone to injury.

🐟 Tank Mates

Despite their size and appearance, Violet Gobies are not aggressive and can be bullied by more dominant fish. Ideal tank mates are brackish-compatible and peaceful.

Recommended companions:

• Mollies

• Bumblebee gobies

• Knight gobies

• Guppies (in brackish conditions)

• Archerfish (if similarly sized and peaceful)

Avoid:

• Aggressive fish

• Fin-nippers

• Bottom dwellers that may compete for space or food

• Pure freshwater or full marine species

🍽️ Feeding Habits

Violet Gobies are filter feeders and scavengers with poor eyesight, meaning they rely heavily on smell to find food. In captivity, they need sinking, soft foods that settle on the bottom.

Diet includes:

• Sinking carnivore pellets

• Frozen bloodworms, brine shrimp, mysis shrimp

• Softened algae wafers

• Blanched vegetables (optional)

• Occasional live blackworms or tubifex

Feed after lights out or in low-light conditions to match their nocturnal habits.

🧼 Care Tips:

• Keep the tank tightly covered, as they can escape through small gaps

• Perform regular water changes (25–30%) with brackish water mix

• Monitor salinity carefully using a refractometer or hydrometer

• Provide multiple hiding places to reduce stress

• Keep the substrate clean to prevent mouth and barb injury

They may appear reclusive but become more active once they feel secure in their surroundings.

🌿 Why Choose the Violet Goby?

The Violet Goby is an extraordinary fish for aquarists who want a peaceful, prehistoric-looking species that brings a unique vibe to their brackish aquarium. With proper care and the right setup, this gentle giant can thrive and become a mesmerizing, active part of your tank’s ecosystem.

Add a touch of mystery and elegance to your aquarium—choose the Violet Goby today!