Crater (; , ), also
Kraytar, is a
district of the
Aden Governorate,
Yemen. Its official name is
Seera (Arabic: صيرة
Ṣīrah). It is situated in a crater of an ancient volcano which forms the Shamsan Mountains. In 1991, the population was 70,319. As of 2003, the district had a population of 76,723 people.