Phronima sedentaria

Phronima sedentaria is a species of amphipod crustaceans found in oceans at a depth of up to 1 km (0.6 mi).

Phronima sedentaria
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Order:
Amphipoda
Family:
Phronimidae
Genus:
Phronima
Species:
P. sedentaria
Binomial name
Phronima sedentaria
(Forsskål, 1775) [1]
Synonyms [2]
  • Cancer sedentarius Forskål, 1775
  • Phronima atlantica Guérin-Meneville, 1836

Description

Females measure up to 42 mm (1.7 in) long, while males are only 15 mm (0.6 in) long.[3]

Distribution

P. sedentaria is found in temperate, subtropical, and tropical waters of all the world's oceans, including the Mediterranean Sea.[2] It is usually found in midwater pelagic habitats, but can be found migrating all the way to the surface.

Ecology

Females of P. sedentaria live in the barrel-like bodies of salps and pyrosomas, and use their strong pleopods to propel their homes through the water. They can somersault quickly in their barrels and thus change directions. The species is carnivorous on zooplankton, krill, and arrowworms.[4]

References
  1. Mark Costello, Denise Bellan-Santini (2011). J. Lowry (ed.). "Phronima sedentaria". World Amphipoda database. World Register of Marine Species. Retrieved March 6, 2011.
  2. "Phronima sedentaria". Zooplankton and Micronekton of the North Sea. Marine Species Identification Portal. Retrieved March 6, 2011.
  3. "Phronima sedentaria". Zooplankton of the South Atlantic Ocean. Marine Species Identification Portal. Retrieved March 6, 2011.
  4. Grzimek's Animal Life Encyclopedia. Volume 2 — Protostomes.

Further reading
  • Cobb, Matthew (August 5, 2010). "Hyperiid amphipods, salps and Alien". Why Evolution is True.
  • Quigley, D.T.G., O'Dwyer, K., Flannery, U. and Flannery, K. 2015. The Pram Shrimp Phronima sedentaria (Forkal,1775) [Crustacea: Amphidopa: Hyperiidea: Phronimidae] in Irish waters and a review of its association with gelatinous zooplankton. Ir. Nat. J. 34(1) 1 - 7.
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