Kalmar Euphausiacea tana nufin tsari na haraji na ƙanana, masu kama da shrimp wanda aka fi sani da krill. Su ne muhimmin ɓangare na jerin abinci na teku, suna aiki a matsayin tushen abinci na farko ga yawancin nau'in whales, hatimi, penguins, da sauran dabbobin ruwa. Sunan Euphausiacea ya samo asali ne daga kalmomin Helenanci "eu" ma'ana mai kyau ko mai kyau, da kuma "phausis" ma'ana haske, yana nuni da yanayin halitta wanda yawancin nau'ikan halittu ke nunawa.