Reproduction is probably viviparous with oophagous embryos like in other mackerel shark species. Mitsukurina is a genus of mackerel shark in the family Mitsukurinidae. Fossil mackerel shark teeth date to the Early Cretaceous. "Cardabiodon" possessed the basic dental characteristics for a mackerel shark. Typically measuring only in length, the crocodile shark is the smallest living mackerel shark.