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      Twospot Tang
      Twospot Tang

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      Photo Details

      Reef Keeper

      Registered: July 2003
      Location: Sumner
      Posts: 7,530
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      Scientific Name: Ctenochaetus binotatus
      Max. size: 22.0 cm TL (male/unsexed)
      Environment: reef-associated; marine; depth range 8 - 53 m
      Climate: tropical; 24 - 26°C
      Distribution: Indo-Pacific = East Africa to the Tuamoto Islands; southern Japan to central New South Wales (Australia) and New Caledonia. Not known from the Red Sea, Gulf of Oman, the Gulf, the Hawaiian Islands, Marquesas, Rapa, Pitcairn Islands, and Easter Island.
      Morphology: Dorsal spines (total): 8; Dorsal soft rays (total): 24-27; Anal spines: 3; Anal soft rays: 22-25. Prominent black spot at the rear base of dorsal and anal fins; adults with a bluish ring around the eye. Dorsal and anal fins dark brown. Caudal fin brown in adults, yellow in young. Edge of lips smooth. Upper teeth usually with 5 denticulations (not including tip). Anterior gill rakers 23-29.
      Biology: Inhabits coral and rubble areas of deep lagoon and seaward reefs. Feeds by scooping film of detritus and unicellular algae (e.g. dinoflagellate Gambierdiscus toxicus) that produce ciguatera toxin making this species a key link in the ciguatera food chain.
      Aquarium Care: Plenty of live rock to graze on, and a healthy growth of microalgae. Not an overly aggressive fish, and usually won't bother tankmates, except similar species (more likely to be picked on by other tangs). One per tank.

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      Additional Info
      Keywords: Twospot Tang; Surgeonfish

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