From Ohio History Central
Channel catfish with barbels.jpg
Barbels may be located in a variety of places. Maxillary barbels refer to barbels on either side of the mouth. Barbels may also be nasal, or extended from the nostrils . Also, barbels are often mandibular or mental, or located on the chin.

The "whiskers" on a fish. These are located on the lips or jaws and assist with touching.