The underbelly of the Chinese paddlefish is white, and its back and head grey. They reach sexual maturity at a weight of around 25 kg (55 lb),[5] usually by the time they are age seven or eight, with a typical body length of 2 m (6 ft 7 in).[citation needed] Anecdotal reports indicate the Chinese paddlefish can reach 7 m (23 ft) in length and weigh up to 500 kg (1,100 lb),[8] or even several thousand pounds.[9] Limited research has been conducted on the species maximum size and weight as a result of its endangered status and lack of sightings over the years.