This is actually not too uncommon. Natural phenomena like hurricanes, tsunamis, etc are very good at keeping the diversity of ecosystems fresh. Parts of the sou

This is actually not too uncommon. Natural phenomena like hurricanes, tsunamis, etc are very good at keeping the diversity of ecosystems fresh. Parts of the southern Pacific Ocean are, by and large, a wasteland--not a lot of life in the water. However, the small islands in the middle of the ocean are awash with all sorts of interesting life, commonly having landed there in some violent event. The warm climate actually is very good for growing vegetation, so herbivores can proliferate if they make it on-land. The BBC documentary South Pacific covers this v well, definitely recommend watching.