The common sawfish, Pristis pristis, is a sawfish of the family Pristidae, found in tropical and subtropical parts of the Atlantic, Mediterranean, eastern Pacific and in northern Australia. As suggested by its name, it was once plentiful, but has now declined drastically leading to it being considered a critically endangered species by the IUCN. Its maximum length is 7.5 metres (25 ft), though 2.5 metres (8.2 ft) is more common. Reproduction is ovoviviparous. Its taxonomy remains unresolved, and...