Chronicles mention more castes than the four commonly known castes in the Hindu social system, some as many as seven castes. Al-Biruni, the famed 10th century Persian / central Asian Indologist mentions sixteen castes including the four basic castes of Brahmins, Kshatriya, Vaishya and Sudras. The "Zakaya" or "Lahud" caste consisted of communities specialising in dance and acrobatics. People in the professions of sailing, hunting, weaving, cobblery, basket making and fishing belonged to specific castes or subcastes. The "Antyajas" caste provided many menial services to the wealthy. Brahmins enjoyed the highest status in Rashtrakuta society; only those Kshatriyas in the "Sat-Kshatriya" sub-caste (noble Kshatriyas) were higher in status.