NUDIBRANCH
Sure, you may be asking how can a Sea Slug take the number one spot for Great Barrier Reef animals. Well, I know if I saw them during a dive, I would spend the rest of my day looking at them. Their striking colours not only make them special but also very easy to spot.
Diver Tip:
While these colourful Sea Slugs can be found in many parts of the world and at just about any ocean depth, they are most abundant in the shallow waters surrounding the Great Barrier Reef.