Ugly Mermen are a type of lake monster reported across the world. Other proper terms for the beings would be Ugly Mermaid (for the female variations), and the all-encompassing Ugly Merbeing for the group as a whole. They have been sighted in Thunder Bay, Lake Superior, first sighted in 1792.
One creature that could be considered an Ugly Merman is the Vodyanoy, a frog-faced creature from Russia. Interestingly, a comparison between them and a bearded seal can be made; Bearded seals normally are found in the Arctic Circle but are able to turn up in surprising places, including the Baltic Sea, Japan, and even inland areas of Florida. The Vodyanoviye have been reported around Olonets, Karelia and adjoining parts of Russia and Finland, which are not far off from the bearded seal's general location.Other possibly related creatures include an aquatic dwarf which wears ragged clothing and a broad hat from Central Europe, and a being described as a large amphibian (referred to as a frog by some and a salamander by others) which moves along the current like a log sometimes referred to as a Pskov Crocodile. While this crocodile is less likely to be a seal, it could very well be the simple case of a giant salamander.
A third theorized explanation is that all or some of the reports of these ugly merfolk is female or otherwise tuskless walruses. These walruses may be considered ugly by human standards, with their ample amounts of wrinkled skin and almost human faces. Although they are naturally pelagic creatures swimming throughout the Arctic Circle, it is not unknown for them to be found well off course, and some of these tuskless members may have, at various times, found their way into freshwater habitats through one way or another.