0
Scientists have filmed an African lungfish using two fins to walk and "bound" along the bottom of its tank. The lungfish appeared to use their pelvic fins as hind legs - stepping along the tank bottom. This suggests, the researchers say, that some fundamental features of walking on land arose in similar fish before the animals made the transition to land.
The team studied the lungfish Protopterus annectens because this group of species is so closely related to tetrapods - land animals with four limbs and backbones, including humans, birds mammals and reptiles. What the group hoped to learn about was one of the greater shifts in animal evolution.
Source
