AKA barbels, these on a South American catfish can reach 4 feet in length & are covered with taste buds
Banjo catfish are 
a family (Aspredinidae) of tiny South American catfish which .... Not only are the 
barbels covered with taste buds and feeling nerves, the ... which is capable of 
reaching up to 3.6 metres (12 ft) in length and can weigh up to 200 kg (450 
pounds).