Mušḫuššu
The mušḫuššu or mushkhushshu is a creature from ancient Mesopotamian mythology. A mythological hybrid, it is a scaly animal with hind legs resembling the talons of an eagle, lion-like forelimbs, a long neck and tail, two horns on its head, a snake-like tongue, and a crest. The mušḫuššu most famously appears on the Ishtar Gate of the city of Babylon, dating to the sixth century BCE.
The form mušḫuššu is the Akkadian nominative of, 'reddish snake', sometimes also translated as 'fierce snake'. One author, possibly following others, translates it as 'splendour serpent'. The older reading sir-ruššu is due to a mistransliteration of the cuneiform in early Assyriology and was often used as a placeholder before the actual reading was discovered.
History
Mušḫuššu already appears in Sumerian religion and art, as in the "Libation vase of Gudea", dedicated to Ningishzida by the Sumerian ruler Gudea.The mušḫuššu was the sacred animal of Marduk and his son Nabu during the Neo-Babylonian Empire. The dragon Mušḫuššu, whom Marduk once vanquished, became his symbolic animal and servant. It was taken over by Marduk from Tishpak, the local god of Eshnunna.
The constellation Hydra was known in Babylonian astronomical texts as Bašmu, 'the Serpent'. It was depicted as having the torso of a fish, the tail of a snake, the forepaws of a lion, the hind legs of an eagle, wings, and a head comparable to the mušḫuššu.