Giant Kelp Kelp, Macquarie Island G iant kelp grows near the shores of the Sub Antarctic islands. I t is important in the ecology of the islands' coastal areas as it provides habitats and shelter for numerous fish and invertebrates. These areas are rich in nutrients so giant kelp beds are often prolific. I t also provides a useful food source when washed up on the beaches after storms.
Kelp flies and other insects feed on the seaweed.