Mudskipper Care Guide - Habitat, Diet & Breeding

Mudskippers are unusual amphibious gobies famous for spending much of their time out of water. Their raised eyes sit on top of the head, allowing them to scan the surface while their muscular pectoral fins help them “walk” across mud. They can also climb, hop and briefly leap between exposed areas of the shore.

Their elongated bodies are usually mottled brown, grey or olive, providing excellent camouflage against mud and mangrove roots. Depending on the species, males may display brightly coloured dorsal fins or enlarged fins during courtship and territorial contests.

In the wild, Mudskippers occupy tidal zones that alternate between submerged and exposed conditions. They breathe through moist skin and the lining of the mouth and throat when out of water, but must remain damp and return to water periodically to replenish those surfaces.

Mudskippers are alert, intelligent and strongly territorial fish. They defend feeding patches and burrow entrances with displays, fin-flaring and open-mouth threats, making them fascinating to observe but less suitable for a conventional community aquarium.

Periophthalmus mudskippers are native to tropical and subtropical intertidal mudflats, mangrove forests and estuaries across the Indo-West Pacific, with related species also occurring along parts of the west African coast. Their range includes coastal regions of Africa, South and Southeast Asia, southern China, Japan, northern Australia and nearby islands.

A single Mudskipper needs at least a 120-litre aquarium or paludarium, with a larger footprint preferred; a practical minimum dimension is around 90 × 45 cm for one adult, with additional space required for multiple fish. The enclosure should provide a broad, gently sloping land area of firmly packed, aquarium-safe sand or mud, a shallow brackish pool, and secure rocks, roots or mangrove-style structures for shelter and climbing. A tightly fitting cover is essential because Mudskippers are powerful escape artists, while the exposed area must remain humid and the water and air surfaces well oxygenated.

Depending on the species, Periophthalmus Mudskippers reach approximately 10–20 cm (4–8 in) in total length. Males are often larger and more robust than females, although adult size varies considerably between species.

Mudskippers are opportunistic carnivores and naturally consume small crustaceans, worms, molluscs, insects and other invertebrates exposed on the mud. Offer a varied diet of marine or brackish invertebrates such as prawns, krill, earthworms, bloodworms, mussel and cockle meat, along with quality sinking carnivore foods. Food should be provided in a way that allows them to feed at the exposed land area as well as in shallow water.

Mudskippers are best kept alone or with carefully selected members of the same species in a spacious, species-focused brackish paludarium. Compatible companions may include robust brackish-tolerant snails or carefully chosen small, non-aggressive brackish fish that use the aquatic area, but every combination carries risk. Avoid delicate fish, slow-moving species, fin-nippers, aggressive predators and freshwater community fish; Mudskippers may harass, injure or consume smaller tankmates, and territorial adults can fight with one another.

Mudskippers are rarely bred successfully in home aquariums. In nature, pairs excavate deep, flooded burrows in muddy banks, where eggs are laid in an air-filled chamber and the male guards and aerates them. Recreating the necessary tidal conditions, burrow structure, salinity changes and seasonal cues is extremely challenging, so captive specimens are generally wild-caught or produced by specialist facilities.

Males are commonly larger and more heavily built than females, and mature males may develop brighter colours, enlarged dorsal fins or more prominent fin markings during displays. Females are usually smaller and less vividly marked, but reliable sexing can be difficult outside the breeding season.