Kalmar "Carcharhinus plumbeus" tana nufin nau'in kifin da aka fi sani da Sandbar shark. Wani babban nau'i ne na bakin teku wanda ke zaune a cikin ruwa mai zurfi a cikin wurare masu zafi da wurare masu zafi a duniya. Shark Sandbar yana da tsayinsa, faffadan hancinsa da babba, fin ƙoƙon kusurwa uku. Yana da jinkirin motsi, nau'in mazaunin ƙasa wanda ke ciyar da farko akan ƙananan kifi, crustaceans, da mollusks. Sunan "Carcharhinus" ya fito ne daga kalmomin Helenanci "karcharos" ma'ana mai kaifi ko jage da " karkanda" ma'ana hanci ko hanci, wanda ke bayyana siffar kan shark. Ma'anar nau'in nau'in "plumbeus" kalma ce ta Latin da ke nufin gubar ko maras kyau, tana nufin launin ruwan toka na shark.