Bubble net feeding does not occur everywhere. Alaska's cold waters and the high amounts of sun exposure in the summer time produce food for humpbacks. Areas such as Antarctica and the North Pacific are host to diverse marine ecosystems that provide adequate feeding opportunities for humpback whales.[11] Southeast Alaska, for example, is home to coastal glaciers that provide plentiful nutrients for suitable fish habitats.[11] Areas with warmer waters such as Mexico and Hawaii where whales go to breed do not provide attractive habitats for fish which is why humpback whales rely on their fat reserves they have from their feeding season.[11]