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
Provide both water and land areas to mimic natural habitat
Maintain slightly brackish water for optimal health
Offer live food to encourage natural hunting behavior
Monitor territory interactions if multiple individuals are kept
❌ Don’ts
Don’t keep in fully freshwater setups for long periods
Don’t neglect land areas or substrate
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.
