Hundreds of new species like the pictured Comb Jellyfish have been discovered by marine scientists on reefs in Australian waters. For more, check out this article(1) and slide show(2).

1. http://news.yahoo.com/s/ap/as_australia_new_marine_life
2. http://news.yahoo.com/nphotos/100s-new-species-discovered-Australia/ss/events/sc/091808ausreefspecies/s:/ap/as_australia_new_marine_life