The extensive protected reefs are full of colourful sponges, hard corals, sea anemones, gorgonian fans and an amazing number of tropical fish;
(The extensive protected reefs; are; full of colourful sponges, hard corals, sea anemones, gorgonian fans and an amazing number of tropical fish)
The extensive protected reefs
are
full of colourful sponges, hard corals, sea anemones, gorgonian fans and an amazing number of tropical fish