King of Spirit Beast is a Manga/Manhwa/Manhua in english language, Animals series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A Kun in the beginning, the cultivation of truth is all about swallowing. In this fantasy world, Fan Lingxiao, the young leader of the Heavenly Pavilion, evolves a small catfish into a spirit-Kun that swallows the earth and the sky, becoming a famous spirit master. However, during the duel at the summit, the Spirit Kun somehow failed to evolve and turned into a ferocious cadaveric Kun, which opened its bloody mouth and swallowed Fan Lingxiao. When he woke up again, the scene before him was very different ……