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The eyes of Ambulocetus were placed on the top of the head, similar to crocodiles and other animals that prefer to keep most of their body submerged with the eyes peeking out of the water. The nasal canal has bony walls extending into the throat, much like in crocodiles where they keep the nasal airways open while the animal is killing prey ...
Evolutionary theory says all animals that are walking on land actually evolved from sea-dwelling creatures at some point in the ancient past. To study this further, scientists from McGill ...
The animal had a flat skull resembling a crocodile's; eyes on top of its head; a neck and ribs similar to those of tetrapods, with the ribs being used to support its body and aid in breathing via lungs; well developed jaws suitable for catching prey; and a small gill slit called a spiracle that, in more derived animals, became an ear. Spiracles ...
The mangrove rivulus can survive for months out of water and can move to places like hollow logs. [5] [6] [7] Some species of fish can "walk" along the sea floor but not on land. One such animal is the flying gurnard (it does not actually fly, and should not be confused with flying fish).
Ichthyostega was a fairly large animal for its time, as it was broadly built and about 1.5 m (4.9 ft) long. The skull was low, with dorsally placed eyes and large labyrinthodont teeth. The posterior margin of the skull formed an operculum covering the gills.
Native to south-east Asia, this fish has strong spines on its pectoral fins that enable its body to "walk" across dry land. It travels from waterhole to waterhole, where it seeks refuge and makes ...
Presumably, the tracks were made by animals walking along the bottoms of shallow bodies of water. [2] The specific aquatic ancestors of the tetrapods, and the process by which land colonization occurred, remain unclear. They are areas of active research and debate among palaeontologists at present.
Hallucigenia is a genus of lobopodian known from Cambrian aged fossils in Burgess Shale-type deposits in Canada and China, and from isolated spines around the world. [4] The generic name reflects the type species' unusual appearance and eccentric history of study; when it was erected as a genus, H. sparsa was reconstructed as an enigmatic animal upside down and back to front. [1]