Isurus Temporal range:
Shortfin mako shark (I. oxyrinchus)
Longfin mako shark (I. paucus)
Scientific classification
Unrecognized taxon (fix):	Isurus
Type species
Isurus oxyrinchus Rafinesque, 1810
Synonyms
Isuropsis Gill, 1862 Lamiostoma Glikman, 1964 Oxyrhina Agassiz, 1838 Oxyrrhina Bonaparte, 1846 Plectrostoma Gistel, 1848

Isurus, commonly known as the mako sharks, is a genus of fast-swimming sharks in the family Lamnidae. They are in fact the fastest-swimming shark. This is in the same family as the great white shark. Isurus ranges in length from 2.5 to 4.5 metres (8 to 15 ft), and can grow to about 800 kilograms (1,760 lb). The genus has a long fossil history.

There are two living species in this genus: the common shortfin mako shark and the rare longfin mako shark.