Complex sentence: The smalltail shark ("Carcharhinus porosus") is a species of requiem shark, family Carcharhinidae, found in the western Atlantic Ocean from the northern Gulf of Mexico to southern Brazil.
Split into simpler sentences: The smalltail shark ("Carcharhinus porosus") is a species of requiem shark, and part of the family Carcharhinidae. It is found in the western Atlantic Ocean, from the northern Gulf of Mexico to southern Brazil.