Multiple choice Neoceratodus is a connecting link between Cyclostomes and Fishes Fishes and Amphibians Amphibians and Reptiles Molluscs and echinoderms Reveal answer Fill a bubble to check yourself B Correct answer Explanation Neoceratodus, or the Australian lungfish, is considered a living fossil that exhibits characteristics of both fishes and amphibians, serving as a connecting link between these two groups.