F-Frog- The African Clawed Frog or Platanna-Here's some info from Google.
All species of Xenopus have flattened, somewhat egg-shaped and streamlined bodies, as well as very slippery skin (because of a protective mucous covering). The frog's skin is smooth albeit with a lateral line sensory organ that has a stitch-like appearance. The frogs are all excellent swimmers and have powerful, fully-webbed toes though the fingers lack webbing. Three of the toes on each foot have conspicuous black claws. The frog's eyes are positioned on top of the head, looking upwards. The pupils are circular. They have no moveable eyelids, tongues (rather it is completely attached to the floor of the mouth or eardrums (similarly to the Surinam toad). Internally, they are somewhat unique in that, unlike most amphibians, they have no haptoglobin in their blood.