Electric fish which swim about in muddy rivers have electric fields, and through these get a sense of where things are around them. (religion-online.org)
If it means anything (and probably won't to anyone) after reading all the comments I dreamed Shiva was in a big muddy river with no skin on his body and the snake around his neck split into two heads and one bit me... and then I woke up sick.» (religion.blogs.cnn.com)
I should know: On our lengthy two - day drive event in the wide - open spaces along the gorgeous Utah - Arizona border, my gas - and diesel - powered Discovery testers scrambled up slippery rock formations, bombed over Martian sand dunes and juked their way through muddy river beds in highly entertaining fashion. (cnet.com)