Select the search type
  • Site
  • Web




Euphausia recurva

(Hansen, 1905)          

Shane Ovington (2014)



Fact Sheet



Physical Description


Life History & Behaviour

Anatomy & Physiology

Evolution & Systematics

Biogeographic Distribution

Conservation & Threats

References & Links

Anatomy & Physiology

The digestive system of euphausiacea consists of two pairs of ostia that perforated their short heart. The stomach can be separated into three parts the anterior part called the cardia, the posterior called the pylorus and the mid-gut called the funnel. The cardias function is the primary filter of the gut, the filtered food is then passed into the food channel which is part of the pylorus. Although this anatomy does not differ greatly from the rest of the Crustacea, it does lack a secondary filter giving a better understanding of links between related taxa (Ullrich, et al. 1991).

  The other unique euphausiacea characteristic is the presence of photophores, these organs are responsible for the bioluminescence present in almost all of the euphausiacea. These organs consist of a lens, pigment cup, reflector and a mass of cells that reflect light. They are thought to be associated with schooling and possibly mating displays (Ullrich, et al. 1991; Ruppert, et al. 2004).

 Photo available at ; Euphausiacea summary