The red wolf-tooth goby (Odontamblyopus rubicundus) is an edible fish that inhabits estuaries.

The red wolf-tooth goby (Odontamblyopus rubicundus) is a fish of the genus Odontamblyopus in the family Gobiidae, named for the large teeth exposed in its mouth, which resemble wolf fangs. It is distributed in coastal waters from India to the western Pacific, and is fairly common in the estuaries along the coast of China, where it prefers to live in muddy and sandy bottoms where fresh and salt water meet, and is skilled at burrowing and living in holes.

In appearance, this fish has a slender body, slightly eel-shaped, and its body color is mostly pink to pale purplish red, with small scales buried under the skin, giving the body surface a smooth look. Its head is broad and flat, its eyes are degenerated, and its mouth opening is very large; the upper and lower jaws bear rows of exposed sharp canine teeth, making it look rather ferocious. It usually lurks in burrows it digs itself, active only near the entrance.

In terms of diet, the red wolf-tooth goby mainly preys on small benthic invertebrates, commonly including polychaete sandworms, small shrimps and crabs, and bivalve larvae, and occasionally feeds on some organic debris. It relies on its keen sense of touch to search for food in the mud and sand, then uses its powerful canine teeth to seize the prey and swallow it.

This fish is edible; in some coastal areas there is a custom of eating it fresh, and it is also sun-dried into fish jerky before being cooked. Its flesh is tender, but its abdominal cavity is small and it contains a lot of viscera and mud, so it needs careful cleaning when being prepared. When buying, choose those with an intact body, normal color, and no off odor.