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Nannostomus eques - Hockeystick Pencilfish

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  • Nannostomus eques - Hockeystick Pencilfish


    Photo thanks to forocious


    Photo thanks to briztoon

    Name:
    Scientific name: Nannostomus eques
    Common name: Hockeystick Pencilfish
    AKA: Brown/Rocket/Brown-tailed/Diptail/Tubemouth pencilfish/ Poeciliobrycon eques/ Poeciliobrycon auratus/ Nannobrycon

    Country of origin:
    South America - Peru, Brazil, Columbia, Guyana

    pH: 4.5 - 7.5
    Temperature: 22 - 28c
    Hardness: 18 - 179 ppm
    Water flow: low - standard
    Oxygenation: standard

    Maximum size: 3.5cm


    Diet: Live, frozen, flake & pellet food of a siutable (very small) size - they are micropredators.

    Breeding:
    Males: more colourful & slimmer

    They lay eggs on the underside of plant leaves. They will predate on their own eggs and fry, so either the fish or eggs should be removed to a seperate tank.

    Tank companions: They hunt red cherry shrimps as adults.They would try for crystal red adult shrimps, but they not be able to kill them unless working together. They would certianly take shrimplets until near adult size. They are OK with Caradina typus, which are much larger.

    Other microfish are suitable tankmates, such as bororas; danios; chocolate, liquorice & sparkling gouramis; green neon & ember tetras; male endlers and royal whiptails, although they are very shy, so a species only tank is preferable. They live in their natural habitat with apistogramma species. Despite their continual non-stop hunting of shrimplets, I have never observed them to display any aggression toward or interest in other fish as prey.

    They should be kept in a group of 10+, which will help to spread aggression, although they rarely hurt each other.

    They swim at the middle to top of the tank.

    Tank:
    Mimimum tank size is 3ft for a small group.

    They prefer a dark substrate, heavily planted, with blackwater from decaying leaves (Indian Almond Leaves are ideal) and floating plants.

    They require a mature tank - do not add them immediately after setting up a new tank.

    They swim at an angle, with their heads up - which is why they are called eques - for horse or rider.

    Their colour will probably fade when the lights are off, and return gradually as the lights come on. They can have a vertical bar pettern after lights off.


    Confused with:
    There are 19 species in the genus:

    Nannostomus anduzei
    Nannostomus beckfordi - Gold line/ Beckford's/ Golden/Brown pencilfish
    Nannostomus bifasciatus - Two-lined/whiteside pencilfish
    Nannostomus britskii - Spotstripe pencilfish
    Nannostomus digrammus - Twostripe pencilfish
    Nannostomus eques - Honeystick/Brown/Rocket/Brown-tailed/Diptail/Tubemouth pencilfish
    Nannostomus espei - Espe's/Barred pencilfish
    Nannostomus grandis
    Nannostomus harrisoni - Harrison's/blackstripe pencilfish
    Nannostomus limatus - Elegant pencilfish
    Nannostomus marginatus - Dwarf pencilfish
    Nannostomus marilynae - Marilyn's/greenstripe pencilfish
    Nannostomus minimus - Least pencilfish
    Nannostomus mortenthaleri - Coral-red pencilfish
    Nannostomus nigrotaeniatus
    Nannostomus nitidus - Shining pencilfish
    Nannostomus rubrocaudatus - Purple pencilfish
    Nannostomus trifasciatus - Threestripe/Three-lined pencilfish
    Nannostomus unifasciatus - Oneline pencilfish

    All Nannostomus spp. are legal imports to Australia as of 20/10/2013:
    http://www.environment.gov.au/biodiv...mport-list.pdf

    The IUCN Red List reports Nannostomus mortenthaleri as a species which has not yet been assessed at 21/10/2013:
    http://www.iucnredlist.org/search

    It is very important not to release any aquarium specimens into our waterways. Any that are not sold or re-homed/ given away, can often be re-sold to aquarium stores. If they are homed in ponds, care should be taken that they cannot escape in run-off into our waterways. Even if fish are native & local they should not be moved from one waterway to another, as this can transfer disease. If they are not local fish, they can both spread disease and either out-compete or eat local fish, shrimp & plants, causing their demise.

    They are a good fish for people with some experience (beginners +1).

    Relevant threads:
    Diet:
    http://www.aquariumlife.com.au/showt...ht=nannostomus

    Video, keeping/treating with tea-tree & other advice:
    http://www.aquariumlife.com.au/showt...ht=nannostomus

    Video of males sparring, keeping with shrimp:
    http://www.aquariumlife.com.au/showt...ht=nannostomus

    Breeding:
    http://www.aquariumlife.com.au/showt...ht=nannostomus
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