 This study examined the neural activity of tethered moving gymnotus omerorum, a type of weekly electric fish, when exposed to objects. The researchers found that the neuron's firing patterns were modified depending on whether or not an object was present. These results suggest that the neural encoding of electrosensory signals may have evolved independently in both African and American electric fish. This article was authored by Olejo Rodriguez-Cotonio, Anna Carolina Pereira, Pedro A. Aguilera, and others.