Description
COMBAT BETWEEN AN OTTER AND A STONE MARTEN. Members of different speeii the picture represents an encounter between an Otter and a Stone Marten which was observed at Beilstein in Swabia. Both these animals are persistent hunters of the Water-Rat and it was probably over such a booty that the combat began. The Man who saw the fight approached the animals unnoticed and killed the Otter, which was on top, with a blow, while the Stone Marten made its escape, although the teeth of the dead animal held a mouthful of Marten-fur. The Marten, however, notwithstanding its inferior bulk and strength, had valiantly borne its part in the fight, as was shown by several severe wounds on the Otter's body. (Martes foina, Lutra lutra)
Date 1895
Source http://www.flickr.com/photos/biodivlibrary/6220160033
Author Brehm, Alfred Edmund; Haacke, Wilhelm; Pechuël-Loesche, Eduard; Schmidtlein, Richard.
Full title Brehm's Life of animals : a complete natural history for popular home instruction and for the use of schools.
Source: https://commons.wikimedia.org/wiki/File:Brehm%27s_Life_of_animals_(Page_181)_(6220160033).jpg

The Eurasian otter (Lutra lutra), also known as the European otter, Eurasian river otter, common otter, and Old World otter, is a semiaquatic mammal native to Eurasia. The most widely distributed member of the otter subfamily (Lutrinae) of the weasel family (Mustelidae), it is found in the waterways and coasts of Europe, many parts of Asia, and parts of northern Africa. The Eurasian otter has a diet mainly of fish, and is strongly territorial. It is endangered in parts of its range, but recovering in others.

The beech marten (Martes foina), also known as the stone marten, house marten or white breasted marten, is a species of marten native to much of Europe and Central Asia, though it has established a feral population in North America.