Many fish species are recommended for new aquarists setting up an aquarium. The fish listed here generally get along well with others and can tolerate a range of water quality parameters. Before ...

The swordtail is a beginner-friendly tropical fish species. This hardy fish comes in various vibrant colors and can be kept in a freshwater tank as small as 10 gallons. These traits make swordtails ...

Some species are showing up hundreds of kilometers beyond their usual home range. Many tropical fish arrive on temperate reefs during summer, and used to die over winter when the water grew colder.

Two females of the newly discovered species, Halichoeres sanchezi or the tailspot wrasse. The males are larger and have different coloration. Credit: Allison & Carlos ...

Starting a home aquarium can be exciting, especially when you choose fish that are easy to care for and visually attractive.