Stigmatogobius sadanundio was first described by Hamilton in 1822. The genus name Stigmatogobius can be broken down into two words. Stigma comes from ancient Greek and means marking or signal. Gobius comes from Latin and means Goby.
Stigmatogobius sadanundio has a characteristic Goby-like body and is pearl grey with irregular small black spots. Adult males have an elongated dorsal fin, from which they take the name Knight Goby. Occurs in estuaries and estuaries in India, Sri Lanka and from the Andaman Islands to Singapore and Indonesia. Lives in both fresh and slightly brackish water. Does not occur in seawater. Adult animals mainly live in freshwater. Younger animals migrate back and forth. Before purchasing, check how the fish is kept, as getting them used to salt or freshwater must be gradual.
Unlike most other goby species, Stigmatogobius sadanundio is not tied to the bottom. It is a free swimmer that is usually found in the middle water layer. Each fish has its own territory. Stigmatogobius sadanundio should be kept as a couple. Males show conspecific aggression. They are peaceful to other fish, except in the breeding season.
Set up the aquarium with enough open areas and shelters. Moderate light, too bright light makes the animals shy. Be careful with small fish. Although the gobies are not specifically predatory, they are opportunists with a large mouth.
Requires fairly hard water. According to some websites, adding 1 or 2 teaspoons of salt per 10 liters of water increases the resistance to disease. The question is whether this is correct, it seems that the species is most often found in freshwater in nature.
Live food, with occasional algae supplements. Most specimens also get used to dry food or coarse granules.
Breeding Stigmatogobius sadanundio
Breeding Stigmatogobius sadanundio is fairly easy. After an increase in temperature, the eggs are deposited in a cave. Both parents take care of the fry. The male takes the largest share in raising the fry.
Patrick de Pijper
Patrick de Pijper