The Bearded Mudskipper (Periophthalmus barbatum) is a species of mudskipper, an amphibious fish known for its ability to live both in and out of water. Here’s what you need to know about it:

General Information

• Scientific Name: Periophthalmus barbatum

• Common Name: Bearded Mudskipper

• Family: Gobiidae

• Habitat: Brackish water environments such as mangroves, estuaries, and tidal flats.

• Distribution: Found in coastal regions of the Indo-Pacific, including parts of Southeast Asia and Africa.

Physical Characteristics

• Size: Typically grows up to 10-15 cm (4-6 inches) in length.

• Coloration: Brownish or grayish body with mottled patterns, helping it blend into muddy environments.

• Eyes: Large, protruding eyes positioned on top of the head, giving it a wide field of vision.

• Fins: Strong pectoral fins allow it to “walk” on land by hopping or crawling.

Behavior & Adaptations

• Amphibious Lifestyle: Can breathe through both gills and its skin when moist, allowing it to survive on land for extended periods.

• Territorial: Males are highly territorial and will defend their space aggressively.

• Burrowing: They dig burrows in the mud for shelter, protection, and maintaining moisture.

• Feeding Habits: Carnivorous, feeding on small invertebrates like insects, crustaceans, and worms.

Aquarium Care

• Tank Size: At least 20-30 gallons for a small group.

• Water Conditions:

• Brackish water (SG 1.005-1.015)

• Temperature: 24-30°C (75-86°F)

• pH: 7.5-8.5

• Substrate: Muddy or sandy bottom to allow natural burrowing behavior.

• Land Area: Essential to provide a dry area, such as rocks or sandbanks, for them to climb out of the water.

• Tankmates: Best kept with other brackish species like archerfish or mollies but avoid aggressive or overly passive tankmates.

Interesting Facts

• Mudskippers use their fins to climb and jump between rocks and branches.

• They have modified gill chambers that store water, allowing them to breathe on land.

• Males perform elaborate courtship displays, including jumping and fin spreading, to attract females.