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Description
Mud Skipper (Periophthalmus spp.)
📌 Basic Info
Scientific Name: Periophthalmus spp.
Common Names: Mud Skipper, Mangrove Goby, Walking Fish
Family: Gobiidae (Gobies)
Order: Perciformes
Origin: Southeast Asia, India, Africa, and the Indo-Pacific — coastal mudflats, estuaries, and mangroves
Size: Up to 4–6 inches (10–15 cm) depending on species
Lifespan: 3 – 5 years
Tank Zone: Bottom and amphibious dweller; can climb out of water
🌊 Water Parameters
TDS: 200 – 400 ppm
pH: 7.0 – 8.0
Temperature: 24 – 30°C (75 – 86°F)
Hardness: 10 – 20 dGH
Salinity: Brackish water preferred (5 – 15 ppt)
🐟 Characteristics
Body: Small, elongated body with brownish or gray coloration, mottled patterns for camouflage, and pectoral fins adapted for walking on land.
Behavior: Amphibious and territorial; spends time both in water and on mud or land.
Swimming Style: Strong bottom-dweller in water; uses pectoral fins to “walk” on muddy surfaces.
Unique Feature: Can breathe through skin and modified gills; can survive out of water for hours if kept moist.
Nature: Hardy but territorial; requires both aquatic and semi-terrestrial environment.
🍽️ Food
Type: Carnivorous
Diet: Insects, small crustaceans, worms, live/frozen foods, occasional pellets
Feeding: Once or twice daily; prefers live or fresh food
Tip: Feed near the surface or on land platforms to mimic natural hunting behavior
🛠️ Maintenance
Tank Size: Minimum 20 gallons (75 L) for 1–2 individuals; larger for multiple
Filtration: Moderate filtration; low water flow preferred
Decor: Mud substrate or sandy bottom, rocks, driftwood, shallow water areas, land platforms
Lighting: Moderate
Water Change: 25% weekly to maintain clean brackish water
👥 Social Behavior
Minimum Group Size: Can be kept alone or in pairs; males may fight during breeding
Tank Mates: Other brackish-tolerant fish; avoid overly aggressive species
Avoid: Slow-moving, delicate freshwater fish
✅ Do’s
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Provide both water and land areas to mimic natural habitat
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Maintain slightly brackish water for optimal health
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Offer live food to encourage natural hunting behavior
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Monitor territory interactions if multiple individuals are kept
❌ Don’ts
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Don’t keep in fully freshwater setups for long periods
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Don’t neglect land areas or substrate
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Don’t overcrowd — territorial behavior may increase
⭐ Quick Tips
The Mud Skipper is a unique amphibious fish, capable of walking on land and swimming in water, making it a fascinating addition to brackish aquariums.
Ideal for aquarists who can provide semi-terrestrial setups, it demonstrates interactive, territorial, and natural behaviors not seen in most aquarium fish.
Best suited for novelty and educational tanks with both water and land areas.