Neocaridina sp. Blue
|Wrote by Tipic, translated by Logow|
Neocaridina sp. Blue
Neocaridina heteropoda (?)
|Common names :
Origin : China, Hong Kong
Water specifications :
- pH : 6.5 to 8
- GH : 6 to 15
- Temperature : 20 to 25°C / 68 to 77 °F
- Male : 2 cm
- Female : 3 cm
Description : Characteristic shape of the Neocaridina genus, medium length rostrum. The colouration background is blue. the body is transparent. It can be slightly dotted with red specks. some specimens have a longitudinal white line that goes from the rostrum to the telson. Colouration varies a lot and even more so on new generations. From the second generation (F2), the shrimps present a yellow shade with a light marbling. We can notice some specimens have a cream longitudinal line on their back representing triangles one behind the other. Other specimens have a blue shade but nothing comparable to their parents. These observations bring up a question ; is this a natural colouration or not? (See on petshrimp.com). According to my observations, this would rather be a chromatic adaptability faculty, where the shrimps contract their chromatophores according to their environment. Different examples to illustrate this theory:
Example N°1 : Shrimps in a tank with a group of small fish. (C.margaritatus, B.hulstaerti, Microrasbora sp. NEON), classic colouration, clear and transparent. Introduction of a little group of CPO (Cambarellus patzcuarensis orange), a few days later, some specimens have taken a camouflage colour ideal to offer protection against the potential predators, with a slightly lighter line along the back. (a bit like on this picture)
Example N°3 (November 2007) : arrival of a new lot of shrimps, shrimps are deep blue in the bag even with more than 12 hours travelling. Slow acclimating to adapt to temperature, and finally establishment in their new tank without any other living beings but with general colouration that tends to be brown. Some specimens have changed colour in the next half an hour to a brown/red shade like on this picture.
So, there is probably a few more experiments that could be done to verify this theory and I can’t be totally certain that my conclusion is the right one, but simply to put in evidence that it’s more of an homochromia phenomenon rather than an artificial colouration. Why this shrimp doesn’t keep its dark blue shade, that stays a mystery but it’s certainly due to the environment of the shrimp before it’s arrival in Europe (natural habitat or exportation tanks). The water specifications, the configuration of their environment, the food or eventual predators.
Behaviour : Excellent gregarious specie this shrimp must absolutely live in groups of 6 individuals no less.
Life span : about 18 months
Feeding habits : Omnivorous it will spend its time searching for food on plans and substrate. It really isn’t a picky shrimp food wise.
Sexual dismorphism : The female are generally larger than the males. The segments that make up the abdomen are lengthened towards the belly to offer protection to the eggs which are held by the pleopods (swimmerets located on the underside of the abdomen)
Reproduction : This specie uses a direct reproduction cycle that doesn’t necessitate a larval stage in slat water conditions. Incubations of the eggs under the abdomen lasts 3 to 4 weeks. the young are 2 to 3 mm long live like their parents and feed in the same fashion. According to my observations, the young always have a brown shade with little cream marblings. If breeding is achieved in a specific tank they are very prolific.
Specificity : The status of this shrimp isn’t clearly defined yet. To avoid any confusion, we announce that we aren’t in any measure able to confirm this is a Neocaridina heteropoda. We simply use the commercial denomination of Neocaridina sp. “Blue”. The importer has told us this shrimp was from Hong Kong (Collection area or exportation is difficult to specify). If you have information about this shrimp don’t hesitate to tell us.
- Wirbellose.de: Neocaridina heteropoda
- Crusta-Fauna.org : Neocaridina heteropoda heteropoda
- Petshrimps.com Forum : Neocaridina sp. “Blue”
Sources (Works) :
- Sußwassergarnelen aus aller Welt, Andreas Karge & Werner Klotz