Palaemon varians

Palaemon varians, known as the Common Ditch Shrimp, River Shrimp or Atlantic Ditch Shrimp, is a shrimp found from the Baltic Sea and the British Isles to the western Mediterranean Sea.[1] It reaches up to 5 cm (2.0 in) in length and is never found in fully marine conditions, instead living in brackish water.[1]

Palaemon varians
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Order:
Decapoda
Infraorder:
Caridea
Family:
Palaemonidae
Genus:
Palaemon
Species:
P. varians
Binomial name
Palaemon varians
(Leach, 1814)

In the aquarium
Palaemon Varians in a temperate freshwater aquarium

Often sold by many aquarium retailers as Feeder Shrimp, River Shrimp or Grass Shrimp and intended as live food for predatory aquarium life. However due to their high tolerance of varying salinity and temperature levels they can survive in marine, brackish or freshwater conditions in temperatures ranging from 1 °C to 30 °C for prolonged periods of time.[2][3] They will feed on any leftover fish food, algae or plant life and are generally peaceful by nature when mixed with similar sized aquarium life.

References
  1. Matthijs van Couwelaar. "Palaemonetes varians". Zooplankton and Micronekton of the North Sea. Marine Species Identification Portal. ISBN 90-75000-56-1. Retrieved July 29, 2012.
  2. http://www.waterwereld.nu/brakwatersteurgarnaaleng.php
  3. https://jeb.biologists.org/content/214/7/1109


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