The stickleback fish, Gasterosteus aculeatus, is one of the most thoroughly studied organisms in the wild, and has been a particularly useful model for understanding variation in physiology, behavior, ...

Stickleback specimens collected in the Big Sur River in 2017 are morphologically different from ones collected in the same location in 1974. (Photo courtesy of E. Palkovacs) Changes in stickleback ...

A female stickleback fish, nick-named 'Mary', has produced offspring from eggs that appear to have been fertilized while they were still inside her, according to scientists at the University of ...

A female stickleback fish, nick-named 'Mary,' has produced offspring from eggs that appear to have been fertilized while they were still inside her, according to scientists. A female stickleback fish, ...

The unarmored three-spine stickleback is one tough little prickly survivor. As a freshwater fish the size of a minnow, fighting for its life in a quasi-desert terrain, the stickleback has survived ...