Complex sentence: The structure and spacing of gill rakers in fish determines the size of food particles trapped, and feeding behaviour, and often changes with the maturing of the fish-for example, juvenile herring living off phytoplankton whereas the adults feed on zooplankton.
Split into simpler sentences: The structure and spacing of gill rakers in fish determines the size of food particles trapped, and feeding behaviour, and often changes with the maturing of the fish. For example, juvenile herring living off phytoplankton whereas the adults feed on zooplankton.