Hello, the mark of the beast in the book of Revelation is not in the book of Daniel. There are beasts in the book of Daniel which relate and expresses governments powers like Greece and so on and describes them as animals hence goat and such. The mark of the beast in Revelation has a name:666. This tells us something more about the animals that we see which are described as government leaders.
Revelation 13:1
Living Bible
13 And now, in my vision, I saw a strange Creature rising up out of the sea. It had seven heads and ten horns, and ten crowns upon its horns. And written on each head were blasphemous names, each one defying and insulting God.
