Lakes are home to diverse animal species, including fish, mammals, birds, and invertebrates[1][6].

**Fish:**
* Lake trout, walleye, and northern pike are common fish species found in lakes[1]. Lake trout are native to Northern North America and live in cold, oxygen-rich lakes[1].
* Other fish include yellow perch, salmon, and crappie[3].
* The Arctic char is a rare fish species that inhabits UK lakes[4].

**Mammals:**
* Beavers, mink, and otters are mammals that live in lakes[1]. Beavers construct dams from sticks and leaves[3].
* Black bears are among the largest land animals found near the Great Lakes[3].

**Birds:**
* Ducks, herons, kingfishers and loons are bird species that live in lakes[1]. Loons are migratory aquatic birds known for their unique calls[1].
* Mute swans are common near Lake Ontario[3].

**Reptiles and Amphibians:**
* Alligators, found in freshwater environments such as lakes, are top predators[1].
* Salamanders, lizard-like amphibians, also live in or around lakes[2].
* Snapping turtles can be aggressive and cause serious wounds more info with their powerful jaws[3].
* Water snakes can also be found in lakes[2].

**Invertebrates:**
* Clams, mussels, water snails, crayfish, and dragonflies are invertebrates that inhabit lakes[1]. Dragonfly larvae are carnivorous[3].

Many other animals can be website found in lakes, such as frogs, electric eels, and various insects[2][7]. Some lake animals, like the lake sturgeon, are endangered[3].

Citations:
[1] https://www.activewild.com/lake-animals/
[2] https://worldanimalfoundation.org/animals/animals-that-live-in-lake/
[3] https://a-z-animals.com/animals/location/ocean/great-lakes/
[4] https://gaiacompany.io/discovering-the-animals-of-uk-lakes-and-rivers/
[5] https://loveourlakes.net.au/resources/wildlife-photo-gallery/
[6] https://www.animalspot.net/lake-animals
[7] https://kids.nationalgeographic.com/nature/habitats/article/freshwater