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Related to Euphausiid: Chaetognatha


see crustaceancrustacean
, primarily aquatic arthropod of the subphylum Crustacea. Most of the 44,000 crustacean species are marine, but there are many freshwater forms. The few groups that inhabit terrestrial areas have not been particularly successful in an evolutionary sense; most require
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commercial name of planktonic marine crustaceans of the orders Euphausiacea (genera Thysanoessa and Euphausia) and Amhipoda (genus Themisto of the order Hyperioidea).

Krill accumulates mainly on the surface of water in the temperate and frigid zones of both hemispheres. It constitutes the food of whales, pinnipeds, pelagic fishes, and birds feeding on plankton. In winter krill sinks to the bottom where it serves as food for benthic fishes. A krill industry producing feed meal, fat, and food pastes has developed in the antarctic.


(invertebrate zoology)
A name applied to planktonic crustaceans that constitute the diet of many whales, particularly whalebone whales.


any small shrimplike marine crustacean of the order Euphausiacea: the principal food of whalebone whales
References in periodicals archive ?
1997) held that the decline in euphausiid abundance off the west coast of Vancouver Island later in late summer, and the development of upwelling-driven high productivity offshore, led to a shift in Pacific hake distribution towards the shelf-break, where flow-field dynamics became more important influences on Pacific hake distribution.
In the Shumagin region, the proportional weight of euphausiids increased from 36% in LSum00 to 64% in Sum01; subsequently, in LSum01, 51% of the stomach contents were euphausiid juveniles and adults and 40% were fish.
Diets ofthese fishes varied temporally, spatially, and between species, but were dominated by insects, euphausiids, and decapod larvae.
This result occurs because the euphausiid group was the dominant prey species group in the diet composition of those stomach samples.
1) that had mixed zooplankton diets of copepods, euphausiid eggs, and euphausiids.
The weighted proportions were then summed across all months and subareas and multiplied by one minus the percentage of assumed euphausiid occurrence within the diet.
Pollock sampled in the EBS during 1982-2006 consumed primarily euphausiids and copepods (Fig.
Later, larger crabs (>8 mm in carapace width (CW)), cultured to serve as predators, were held individually in mesh cells (diameter, 10 cm; water depth, 10 era) and were fed fresh-frozen euphausiids (Euphausia pacifica) 3 times per week.
Crustaceans, like euphausiids, can be a substantial component of the diet of sanddabs (Hopkins and Hancock 1980) and euphausiids can serve as intermediate hosts for Anisakis sp.
Most prey species identified from bowhead whale stomach contents were crustacean zooplankton, particularly euphausiids and copepods ranging in length from 3 to 30 mm.
alutus) actively fed on euphausiids just above sea-whip "forests" during the day and were observed to be less active within the sea-whip habitat at night (Brodeur, 2001).
5 mm) comprised the majority of juvenile POP diets for all size classes; however, larger prey items such as euphausiids were consumed by medium and large juveniles (Fig.