Freshwater

Freshwater fish spend part or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%.

Showing 1–5 of 5

Poecilia sphenops

The Black Molly has an elongated body. Females tend to be more rounded in appearance. The …

Xiphophorus hellerii

Green swordtails have elongated, narrow bodies that are flattened on the sides. They also have large …

Poecilia reticulata

Guppies exhibit pronounced sexual dimorphism, with males and females differing in size, shape, and colouration. Males …

Heterandria formosa

Least killifish differ little in body shape from their closest relatives, the Poecilia. They have an …

Gambusia affinis affinis

The male anal fin is modified and is an intermittent organ for introducing sperm into the …