Vampyrius
The hooks on the tadpoles' mouths show that they eat eggs and only eggs. The mother frog lays extra unfertilized eggs (to feed them). This is an example of advanced parental care. The tadpoles can open their mouths very wide, so they can eat large things, for examples eggs with a jelly coating still on. The tadpoles' intestine pouches can also stretch very wide to hold many eggs. It shrinks when the tadpole does not eat.