Indian Frogeye Goby is a small bottom goby, often territorial over a favourite cave. Some are strictly freshwater grazers while others (e.g. bumblebee gobies) prefer brackish water — check the species.
Care tips
Confirm freshwater vs. brackish needs for the exact species.
Offer small live/frozen foods; many ignore dry flake.
Provide caves/territories — gobies defend a small patch.