Freshwater fish are grouped into several families, perhaps the most well known being cichlids (e.g. Lemon cichlid - Neolamprologus lepeuli), cyprinid (e.g. Clown barbs - Puntius everetti and zebras - Danio rerio), characins (e.g. Neon tetra - Paracheirodon innesi) and live bearers (e.g. Guppy - Poecilia reticulata).
A couple of examples of marine fish are the Butterflyfish (e.g. Chaetodon falcula) and the Clownfish (e.g. Amphiprion ocellaris) - like the star of the the film, Finding Nemo.
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