1) Fish genus 2) Genus isurus 3) Mako sharks 
Isurus is a genus of mackerel sharks in the family Lamnidae, commonly known as the mako sharks. The two living species are the common shortfin mako shark (I. oxyrinchus) and the rare longfin mako shark (I. paucus), and several extinct species known from fossils. They range in length from 2.5 to 4.5 m (9 to 15 ft), and have an approximate maximum w...
[n] - mako sharks
genus Isurus noun mako sharks