It is very largely a bottom feeder and, therefore, rather of a sluggish nature.
The barbel projecting from the chin denotes that it is a bottom feeder.
It is a bottom feeder, and sinkers must be used to keep the bait near the fish.
As it is a bottom feeder a sinker must be used to keep the bait at the proper depth.
[1990s+; fr the presumed disgusting habits of fish and other marine forms that feed on the bottom, hence eat slime, excrement, etc; the fact that bottom means ''ass'' may not be entirely irrelevant]