Terracotta kantharos (drinking cup), Etruscan culture, late 4th century B.C.

Obverse and reverse, ketos (sea monster).
Because the trip to the Underworld was believed to involve a sea voyage, marine creatures, both real and imaginary, were often associated with death in Etruscan culture. Both hippocamps (sea horses) and kete (sea monsters) were presented in a positive light, often guarding the deceased or transporting them to the Underworld.