Complex sentence: The labial palps finally funnel the food into the mouth, where digestion begimussels are usually found clumping together on wave-washed rocks, each attachehabit helps hold the mussels firm against the force of the waves.
Split into simpler sentences: The labial palps finally funnel the food into the mouth, where digestion begins. The clumping habit helps hold the mussels firm against the force of the waves.