I´m frustrated, two weeks ago I´ve bought that fish and nobody could tell me what it is. I´ve searched nearly every austrian and german Forum and nobody could help me jet.
Looks like Somileptes gongota, a loach from India. They really need a sand substrate that they can bury themselves in, your fish is likely to be stressed if it is unable to do so (and it may injure itself it if tries on a gravel substrate).
Pete