Kalmar "Order Amphipoda" tana nufin ƙungiyar haraji na ƙanana, masu kama da shrimp waɗanda ke cikin Malacostraca ajin. Wadannan halittun suna siffantuwa da karkatattun jikunansu, kashinsu na ciki, da nau'i-nau'i na ƙafafu da yawa waɗanda aka daidaita don yin iyo da rarrafe. Ana samun Amphipods a cikin wurare masu yawa na ruwa, tun daga rafukan ruwa da tafkuna zuwa ramukan ruwa mai zurfi, kuma suna taka muhimmiyar rawa a cikin gidajen abinci a matsayin mafarauta da ganima.