Cybium Proosti tooth collected from the Eocene Bracklesham Beds in Lee on Solent, Hampshire. Cybium is a genus of the Mackerel family of fish. The Bracklesham beds in which these teeth were found are well known among paleontologists and fossil collectors in Britain; they have yielded over 160 different species of fish and the beds continue to be productive today despite having been pillaged by collectors for over 100 years. We supply both B grade specimens and teeth which are in very good condition - A grade (see images). Naturally the size of the teeth varies, these specimens measure between 6 and 10 mm in length and are supplied in small plastic bags with an information label.