The FreshWater ElephanTFish: South Africa

The Elephantfishes are a diverse family, with different sizes and shapes.
The smallest are just 5 centimetres (2.0 in) in adult length and the largest up to 1.5 metres (4.9 ft).

Also, its cerebellum (part of the brain) is very enlarged, with a size ratio similar to that of humans!
Finally, elephantfishes are notable for their ability to generate electric fields that permit them to sense their environment in turbid waters.
Listen to Electric Fish here: CLiCK