A tiny, scaleless, freshwater fish, the highly endangered unarmored threespine stickleback is a fierce protector of its nest, which it defends by dashing forward with gaping mouth and “hackles” raised ...

The results show that fish from shallow waters, such as the three-spined stickleback and zebrafish, adapt more quickly to temperature changes. "The heat tolerance of these two species changed ...

This article was originally published with the title “ The Curious Behavior of the Stickleback ” in Scientific American Magazine Vol. 187 No. 6 (December 1952), p. 22 doi:10.1038 ...

BREEDING: The male threespine stickleback establishes a territory that he vigorously ... LIFE CYCLE: Most of these fish live for about a year. They do not usually survive to a second spawning season.

They included Atlantic salmon, brown trout, European eel, lamprey, flounder, stickleback and Stoneloach ... "Anyone who discovers dead fish in the area is advised not to touch anything, and ...

"Over 2,000 dead fish have been collected so far, including Atlantic salmon, brown trout, European eel, lamprey, flounder, stickleback and Stoneloach," the Loughs Agency said. "Of particular ...