The bluntnose guitarfish or fiddlefish (Acroteriobatus blochii) is a species of ray in the family Rhinobatidae. It is found in Angola, Namibia, and South Africa. Its natural habitats are shallow seas and estuarine waters. It is potentially threatened by habitat loss owing to diamond mining on the Namibian coast. A. blochii is frequently misidentified as and closely related to A. annulatus.