恒河鳄（学名：Gavialis gangeticus），又名食鱼鳄、长吻鳄，是长吻鳄科恒河鳄属中的唯一品种。恒河鳄身体修长，体色为橄榄绿色。在IUCN红色名录上被列为极危物种。

恒河鳄是一种淡水鳄鱼，主要分布响印度河、恒河、马哈拉迪河及布拉玛普特拉河这4条河当中，以前于孟加拉也有，但现在已于当地绝种。恒河鳄喜欢栖息于水流又急又深，水质较好的河里。

The gharial (Gavialis gangeticus), also known as the gavial, and the fish-eating crocodile, is a crocodilian of the family Gavialidae, native to the northern part of the Indian Subcontinent. The global gharial population is estimated at fewer than 235 individuals, which are threatened by loss of riverine habitat, depletion of fish resources, and entanglement in fishing nets. As the population has declined drastically in the past 70 years, the gharial is listed as Critically Endangered on the IUCN Red List.