This species occurs in a wide variety of habitat types, including the open ocean, brackish waters, and the freshwater habitat of rivers. In Australia it can be found in harbors and estuaries around piers. Its ability to survive in a wide range of salinities makes it a model organism in the study of salinity tolerance. Juveniles are especially tolerant to salinity changes, easily maintaining homeostasis in variable environments such as estuaries. Although the silver moony displays territorial behavior, the species can be kept in saltwater aquaria and is easy to rear in captivity. It can remain solitary or form schools. It is a detritivore and planktivore.

Brackish water Archer Fish. Great for terrariums! Watch as they target insects on branches above with jets of water spit from their mouths. The jet of water knocks the insect into the water where the Archer waits to eat it.

Fat Sleeper Gobies live in intertidal areas on muddy bottoms, and is more frequent in brackish water. It can be found commonly in freshwater or saline coastal pools and river mouths. These fish are jumpers. Be sure to have your aquarium covered. They do get large(4.5″-5.5″). They will eat what they can catch and fit in their mouths. Our Fat sleepers range in size from 1.5″-3″. You may specify size when ordering in the comments are of the shopping cart.