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Many freshwater fishes are also popular as food.
Chameleons are reptiles with an ability to change their colours.
The archaeopteryx shows characteristics of both birds and reptiles. It is probably the...
A transitional form between fish and tetrapods, or four-limbed vertebrates.
Curious little animal living in underground burrows in the African savannahs.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
Extinct species of fish which had thick ´armour´ protecting the head.
A video about a pink wading bird with an arcuate bill. Its peculiarity is that it sleeps...