It's not helicopter fish. Helicopter fish are looking like this-

[image source: Wekipedia]

They are called "Short-nosed tripod fish", Scientific name is "Triacanthus biaculeatus".

But, I can't recognize this species. Looks like Jurassic Fish "Coelacanth". It seems to be one Black Scribbled Goby fish, a species of goby native to freshwater.