An octopus prop bet specifically requires a player to secure the ball in the end zone on both the touchdown and the conversion. An octopus bet in football can cover a quarterback, but they would need to actually run the ball in themselves before also running in the conversion.
As a result, some online bookmakers offer only casino and some only offer online sports betting. To bet online legally in Spain, you must open an account with an internet bookmaker that uses a .es domain name and is licensed by the Spanish gambling regulator, Direccin General de Ordenacin del Juego (DGOJ).