Talassii are one of the Families of Beasts, representing nightmares of Confinement. This may refer to literal captivity, or a more metaphorical restriction of freedom. Due to an Anathema placed on the whole Family centuries ago, the Talassii are widely reputed to rape their victims -- indeed, the Family name is an allusion to the historical "rape of the Sabine women." However, in reality it is merely the confinement that a Talassii represents, and many of them may insist on keeping their captives in relative comfort as a way of distancing themselves from their unsavory reputation.[1]
The Horror of a Talassii need not look like any particular thing: there are many possible ways to lure in prey. Like the Inguma, though, even a Talassii Horror that can mostly pass for a human will still have some unnatural trait or other visual 'tell' that reveals its inhuman nature. Many Talassii can pass for members of other Families, and some do so in order to avoid the stigma of the family name.