Giant mudskipper
Large amphibious goby found in Indo-Pacific mangroves.
This large amphibious fish inhabits muddy shores across the eastern Indian Ocean and western Pacific. It breathes air through its skin and mouth, living mostly on land in burrows. Males care for eggs by aerating them with fresh air.
- Females grow slightly larger than males, reaching 28.5 cm.
- It breathes air through skin and mouth, not just gills.
- Males aerate egg chambers by trapping air in burrows.
- Displays a black lateral stripe when disturbed or angry.
- Uses pectoral fins to walk and skip across muddy ground.
What it is
The giant mudskipper is a substantial member of the goby family, notable for its ability to live on land. Its body is elongated and covered in scales, except for the throat area. The fish usually appears yellow or greenish-brown with pale blue spots. When agitated, it displays a distinct black stripe running from the eye to the tail base. Protruding eyes sit atop its head, allowing vision in both air and water. These eyes can retract into sockets and blink using a membrane. The species uses fused pelvic fins to cling to surfaces and pectoral fins to move across mud.
Where it lives
This species inhabits the tropical coasts of the eastern Indian Ocean and western Pacific. Its range extends from eastern India through Thailand, Malaysia, Singapore, Indonesia, and Vietnam. It thrives in intertidal zones, particularly within mangrove forests and muddy estuaries. While it prefers areas near mangroves, it also occupies mudflats lacking vegetation. The fish lives in marine, brackish, and fresh waters, often constructing burrows in the higher parts of the tidal zone where water and air mix.
How it lives
As an obligate air-breather, this fish must access atmospheric oxygen or it will drown. It respires primarily through highly vascularized mouth surfaces and skin capillaries on its head. Thickened gill structures help retain moisture but play a smaller role in breathing. It hunts as an ambush predator, leaping at small crabs and fish near its burrow. Males feed on crabs during low tide, switching to insects or worms when tides are high. Females prefer small fish near the water edge. The animal is solitary and territorial, showing aggression through fin raising and chasing. Insects often swarm its head, prompting it to roll in sediment or dip into water for relief.
Breeding and life cycle
Spawning happens twice annually, typically between June and July, and again from October to November. This timing aligns with monsoon seasons that increase food availability. Males dig J or U-shaped burrows to attract a single female, as the species is monogamous. Females attach eggs to the burrow walls or roof, avoiding the hypoxic water below. After laying eggs, the female leaves, and the male becomes the sole caregiver. He maintains oxygen levels for the developing brood by gulping air at the surface and releasing it into the burrow during low tide.
Fish and people
Local commercial fisheries catch this species, though it holds minor economic importance. It is sold as a food source in various markets. In Malaysia and parts of India, people use the fish in traditional medicinal practices. The genus name honors Johann Albert Schlosser, a Dutch naturalist who sent specimens to Peter Simon Pallas. The specific epithet reflects its toothed nature and visual similarity to the Periophthalmus genus.
Status and threats
The International Union for Conservation of Nature lists the giant mudskipper as Least Concern as of 2017. Despite this stable status, populations face pressure from overfishing and pollution. Urbanization and habitat destruction pose significant threats, forcing some fish into urban areas with less food and cover. Changes in salinity levels also stress the animals, increasing energy needed for osmoregulation and reducing time available for feeding.
Questions people ask about Giant mudskipper
How does the giant mudskipper breathe on land?
It relies on air breathing through its vascularized mouth lining and skin capillaries. The gills are adapted to hold moisture rather than extract oxygen from air. The fish must gulp atmospheric oxygen regularly to survive outside water.
What do giant mudskippers eat in the wild?
They are carnivorous generalists that prefer small crabs and fish. Males hunt crabs during low tide and switch to insects or worms during high tide. Females often target small fish near the water's edge, especially during spawning seasons.
How do they reproduce and care for young?
Males dig burrows to attract a single female. After she lays eggs on the burrow walls, she leaves. The male stays to guard the brood, repeatedly filling his mouth with air and releasing it into the burrow to keep the eggs oxygenated.
Good reading and sources
- Giant mudskipper on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Giant mudskipper", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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