Our mighty catfish has an arsenal of senses to assist it in finding food. They can find food in the dark and under muddy conditions. Their sense of smell is well known, but few know how their body can preform this task with such accuracy. They have more olfactory folds in their nasal chamber than all fish species. For example, a Channel cat has somewhere around 140 folds, while members of the bass (large mouth and small mouth), bream/blue gills, crappie and trout have around 12 to 24. Blood, which contains amino acid can be picked up by the catfish in minute traces. There sense of taste would put a human taster to shame. They can just brush against food and tell whether or not they want it. Or they can touch the bait with their whiskers (barbels). They have excellent sense of hearing, plus their lateral lines can pick up vibrations. The ears are located on each side of the head, even tho they have no openings. Sound can be detected thru their otoliths, which are located on each side of the head and the sound vibrates within the ear bone. For those far off sounds/virbrations that the ear bone can not pick up, there are the lateral lines along the length of the cat. This lateral line is common among-st most fish species. I'm sure that most of us have always heard that a catfish eyesight is poor and that is why they have to depend on their other senses. True that the catfish eyeball is small in comparison to other game fish. For the catfish to feed on live fish they do depend on their eye sight and lateral lines. In clear water the eyes become the main source/factor in locating bait fish. The catfish has a few more trick up it's sleeve in detecting food. They have tiny pores/pits on their head and scattered thru-out the body trunk. All species of fish put out electrical current and the catfish can detect these under any kind of water conditions. The foregoing information has been gleaned from the North American Fishing Club, the BOC and by information Googled from the Internet.