The answer is: Coastal ecosystems have more sunlight, more nutrients, and higher levels of productivity than open ocean ecosystems.
Coastal ecosystems are areas where land and water join (bays, estuaries, salt marshes, mangroves, wetlands).
In coastal ecosystems live many different types of plants and animals.
The ocean is divided into four major zones: the intertidal, neritic, oceanic and abyssal, each zone includes several ecosystems, which have adapted to specific habitats.