Complex sentence: Ocenebrinae is a taxonomic subfamily of predatory sea snails, marine gastropod mollusks, within the large family Muricidae, which are commonly known as the murex and rock snails.
Split into simpler sentences: Ocenebrinae is a taxonomic subfamily of predatory sea snails, marine gastropod mollusks. This subfamily is within the large family Muricidae, which are commonly known as the murex and rock snails.