Complex sentence: The fish in this example is below its expected weight, and a scientist might then look for more information to find out if other red drum in the area are also below expected weight, and then why this might be.
Split into simpler sentences: The fish in this example is below its expected weight, and a scientist might then look for more information to find out if other red drum in the area are also below expected weight. If red drum in the study area tend to be below expected weight, then the scientist might further investigate why this might be.