Not evaluated (IUCN 3.1)
The Silver drummer (Kyphosus sydneyanus), is a species of sea chub native to the Pacific Ocean from Australia to New Zealand where it occurs in shallow waters on rocky reefs. This species can reach a length of up to 80 centimetres (31 in) TL, and they may weigh up to 1.1 kilograms (2.4 lb). This species is important as a food fish for local indigenous peoples.
It's diet is mainly composed of phaeophytes, typically Ecklonia radiata, and rhodophytes. K. sydneyanus has a highly vascularised hing gut chamber, which is separated by a sphincter. This is where the majority of microbial fermentation occurs. The microbial fermentation allows the fish to properly digest phaeophytes. 
- Froese, Rainer and Pauly, Daniel, eds. (2013). "Kyphosus sydneyanus" in FishBase. August 2013 version.
- Skea, GL., Mountfort, DO., Clements, KD. Gut carbohydrases from the New Zealand marine herbivorous fishes Kyphosus sydneyanus (Kyphosidae), Aplodactylus arctidens (Aplodactylidae) and Odax pullus (Labridae)
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