Mexican golden trout
Needham's explorations led to the publication of Rainbow Trout of Mexico and California (1959) with coauthor Richard Gard.[5] The Mexican golden trout is sexually dimorphic; males can easily be identified from females due to their much longer jaws or kype.Mexican golden trout are brightly colored with blue parr marks on both males and females along the side of the body.Due to their small range and highly sensitive, isolated habitat, Mexican golden trout are considered vulnerable.Sanitation practices in the region where the golden trout is found is minimal, so much of its home water is polluted with residential sewage and trash.