Pelagomacellicephala iliffei Discovered: 1985 Location: Caicos Islands Size: 5-9 mm
This segmented worm was first sighted in a deep tidal pool within a blue hole. The species was named for biologist Tom Iliffe, who has found more than 300 new invertebrate species in blue holes. These animals represent three new orders, nine new families, and 55 new genera. Given that blue holes are still relatively unexplored, many other animals unknown to science likely lurk in their depths.