👉 Cusk-eels are small, flat-bodied fish that primarily live in freshwater ecosystems. They have a distinctive white body with black spots and can grow up to 10 inches long. Cusk-eels are omnivores and feed on a variety of prey such as insects, crayfish, and small fish. They are known for their ability to mimic human speech through their vocalizations, which they use to communicate with other species in the ecosystem.