Complex sentence: Bluegills are delicious fish but are often overlooked due to their small size, the fact that their growth in ponds may become stunted due to high populations, their small bones, and lack of a developed commercial market.
Split into simpler sentences: Bluegills are delicious fish but are often overlooked due to their small size. This may be due to the fact that their growth in ponds may become stunted due to high populations, their small bones, and lack of a developed commercial market.