Kalmar "nemertine" tana nufin memba na phylum Nemertea, wanda rukuni ne na invertebrates wanda ya ƙunshi kimanin nau'in tsutsotsi 1,200 na ribbon ko tsutsotsi na proboscis. Wadannan tsutsotsi yawanci elongated ne, siriri, kuma ba a raba su, tare da proboscis da ake amfani da su don kama ganima. Ana samun Nemertines a cikin mahalli na ruwa a duniya, daga yankuna masu zurfi zuwa zurfin teku.