What is "karabisianoi"

The Karabisianoi , sometimes anglicized as the Carabisians, were the mainstay of the Byzantine navy from the mid-7th century until the early 8th century. The name derives from the Greek karabos or karabis (Greek: κάραβος, καραβίς) for "ship", and literally means "people of the ships, sea-men". The Karabisianoi were the first permanent naval establishment of the Byzantine Empire, formed to confront the Muslim expansion at sea. They were disbanded and replaced with a series of maritime themes some time in 718–730.