Here are our favorite types of freshwater fish you can keep as a pet. If you're in the throes of setting up a home aquarium, ...

Scientists and fishermen in Brazil caught an “armored” river creature known to sting and discovered a new species, a study said. Photo from Willian Massaharu Ohara via Tencatt, Ohara, Carvalho, and ...

Photos show the color variation of the new species. Wild-caught fish were usually “light brownish orange,” while aquarium-bred fish were a paler “greyish yellow.” Almost all of the fish ...