They can smell it and feel it with their 'whiskers.'
Channel catfish typically have dark gray to blue-green bodies with a lighter underside, and their fins are usually dark or mottled in color. While some individuals may exhibit a reddish hue in their fins, this is not characteristic of the species as a whole. The coloration can vary based on factors like habitat and water quality, but red fins are not a defining feature of channel catfish.
Dark water
Water that is muddy and dark from particles is called turbid water. Turbidity is a measure of the cloudiness or haziness of a liquid caused by suspended solids.
turbid
No, "murky" means hard to see through. Deep water can be murky because it is often dark, but shallower water can also be murky if it is muddy.
A brownish purple. In equal parts, a muddy brown.
A rather muddy black.
Something pretty muddy... much like caput mortuum
A black shale is a form of dark muddy rock, which is rich in sulphides and organic material.
muddy, wet, dark and loads of shrubs. It's dark because of the canopy (lots of trees leaves) above you.
Reality- channel 289
light brown and then dark brown to black when wet and muddy