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Nannostomus marginatus
Dwarf pencil fish
breeding notes

BREEDING: This is a typical egg scatterer and as such is best spawned over marbles to avoid predation. In a well planted and understocked aquarium young may also survive. The fry are small and need infusoria as a first food.

Have you bred Nannostomus marginatus? Why not fill in a breeding questionaire?


This page summarises breeding reports provided by visitors to this site, along with some statistical analysis. Please feel free to contribute - whatever your experience!

2 breeders have filled in breeding reports, a summary of the results are shown in the graphs below. You can read the full reports here.

To add details of your experiences of Nannostomus marginatus, why not fill in a Breeding and maintenance Report.

Would Nannostomus marginatus be a good addition to a community tank?
graph1
  1. Never
  2. Doubtful, only with VERY calm fish
  3. Only with species of similar size
  4. Yes, a good community fish

How would you describe the disposition of Nannostomus marginatus?
graph2
  1. Very timid
  2. Slightly timid
  3. Neutral
  4. Somewhat aggresive on occasions
  5. Very aggressive

In which water conditions do you keep these fish?
graph3
  1. Very soft and acidic
  2. Moderately soft and acidic
  3. Neutral
  4. Moderately hard and alkaline
  5. Very hard and alkaline

At what average temperature?
graph4
  1. 10-15°C
  2. 16-19°C
  3. 20-23°C
  4. 24-27°C
  5. 28°C+

How would you describe sex ratios when breeding Nannostomus marginatus? If you are unsure please leave this question unanswered.
graph6
  1. Almost all males
  2. Somewhat male heavy
  3. Roughly equal
  4. Somewhat female heavy
  5. Almost all females

In general, how difficult is Nannostomus marginatus to keep and breed?
graph7
  1. Very easy
  2. Easy
  3. Average
  4. Difficult
  5. Very difficult

How sucessful have you been at breeding Nannostomus marginatus?
graph8
  1. Very unsucessful
  2. Fairly unsucessful
  3. Average
  4. Fairly sucessful
  5. Very sucessful


Remember, each record represents only one persons experience; if you had different results, or used different methods, please share your experiences


Water conditions: Moderately soft and acidic Water temperature: 24-27oC
Disposition: Active, but not aggresive Community tank?: Yes, a good community fish
Spawning Method: Breeding problems: none
Sex ratio: Breeding difficulty:
Sucess: Years Experience: 1
Other Comments:
Date this record created: 9th February 2013Breeding date: 2013
Breeder: Location:

Water conditions: Very soft and acidic Water temperature: 24-27oC
Disposition: Active, but not aggresive Community tank?: Yes, a good community fish
Spawning Method: Peat (or similar) spawning substrateBreeding problems: none
Sex ratio: Roughly equalBreeding difficulty: Very easy
Sucess: Fairly sucessfulYears Experience: 3
Other Comments:
Date this record created: 21st July 2008Breeding date: 2008
Breeder: Location:







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Fishkeeping Facts and Tips

Avoid tankbusters! Too many tropical fish stores sell small fish that will continue growing until too big for any home aquarium. Rehousing can be very difficult indeed. Avoid species such as the shovel-nosed and red tailed catfish


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