Complex sentence: Flounder ambush their prey, feeding at soft muddy areas of the sea bottom, near bridge piles, docks and coral reefs, and have been also found at the bottom of the Mariana trench, the deepest known ocean canyon.
Split into simpler sentences: Flounder ambush their prey, feeding at soft muddy areas of the sea bottom, near bridge piles, docks and coral reefs. They have been found at the bottom of the Mariana trench, the deepest known ocean canyon.