Thomas of Cantimpré [circa 1200-1272 CE] (Liber de natura rerum, Fish 7.16): Bothe are river fish, which do not swim except by the extending of their bodies. For they are very thin fishes, and very large. They have fins around their broad body. When it is hunted by fishermen, it goes to the bottom and muddies the water above it so that it cannot be seen, especially because, clinging to the sea bed, the back of its body is very similar to the mud. It has red spots on its back. It reproduces in certain river waters, but not in all; in ponds, however, with difficulty and very rarely. Bothe, as Aristotle says, are impregnated by the south wind. - [Badke translation/paraphrase]