Revelation’s Sea Beast is Daniel’s 11th horn.

This article discusses Revelation 13:1-2. A Beast comes out of the Sea. The Dragon gives it its power and throne and great authority. This Beast is the Antichrist. In the end-time, people will be forced to accept its mark on their foreheads. This article identifies the Beast as the Antichrist-horn of Daniel 7. A further article identifies it more specifically.