Cooper of the sea

Cooper of the sea

taxobox
name=Cooper of the sea
status=LC
regnum=Animalia
phylum=Arthropoda
subphylum=Crustacea
classis=Malacostraca
ordo=Amphipoda
subordo=Hyperiidea
infraordo=Physocephalata
familia=Hyperiidae
genus="Phronima
species="P. sedentaria"
binomial="Phronima sedentaria"
binomial_authority=Forsskål, 1775

The cooper of the sea is a species of amphipod crustacean found in oceans at a depth of up to 1 km.

Characteristics

Females are 14 mm in length, males are 15 mm in length. Males have an elongated basis of the first antenna. The eyes make up nearly a quarter of the body, giving rise to the infraorder name Physocephalata, meaning "large head". Each of the two eyes is divided into a medial and lateral eye.

Ecology

These crustaceans are usually found in midwater pelagic habitats, but can be found migrating all the way to the surface. Females live in the barrel-like bodies of salps, and use their strong pleopods to propel their homes through the water. The amphipod can somersault quickly in the barrel and thus change directions. "Phronima sedentaria" is carnivorous on zooplankton, krill, and arrowworms.

References

Grzimek's Animal Life Encyclopedia. Volume 2 — Protostomes.

External links

* [http://www.biology.duke.edu/johnsenlab/gallery/phronima.html A cooper in its salp] .


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