Seabeth and Seajen is a Tortallan fief. Seabeth and Seajen were once only one fief, Seabeth, but the lord of the fief decided to split it in two and gave half to each of his twin sons. His will was drawn up so the fief could never be legally separated into two fiefdoms. Since the twin brothers had no sons of their own, Lady Ilane and her sister inherited the fief, with half going to Ilane, and half to her sister. It is unknown if Ilane inherited the Seabeth or the Seajen half of the fief.
The fief is located in the north on the coast, and is victim to raids from Scanran pirates.