Complex sentence: The coelacanth's auditory reception is mediated by its inner ear, which is very similar to that of tetrapods because it is classified as being a basilar papilla.
Split into simpler sentences: The coelacanth's auditory reception is mediated by its inner ear. The inner ear of the coelacanth is very similar to that of tetrapods because it is classified as being a basilar papilla.