Elephantnose fish scan the riverbed using electric currents
“Its chin is used a bit like a metal detector, swept over the riverbed”
That’s not a trunk hanging from the elephantnose fish’s face. Despite the confusing name, the facial appendage is actually an elongated chin known as a Schnauzenorgan. It’s used a bit like a metal detector, swept back and forth over the muddy African riverbed until a tasty morsel is found.
This organ works by emitting an electrical field, which is modified when an object enters it. The clever fish can determine whether items it detects are alive or dead, enabling it to locate live prey.
This territorial fish is nocturnal and can grow to a maximum length of 22.5cm (8.9in)