Nestled just beyond Apollo Bay, Marengo Reefs Marine Sanctuary spans 12 hectares of protected ocean waters, preserving one of Victoria’s most biologically diverse marine environments. At approximately 150 metres offshore lies Little Henty Reef, an expansive sandstone reef system divided into two main sections, the inner and outer reefs, separated by a narrow channel known as “The Gap.” The reef’s geological history has formed a habitat that supports an extraordinary array of marine life, creating a captivating underwater world for exploration.
Intertidal and Subtidal Life
Visitors exploring the intertidal zones of Little Henty Reef can encounter a colourful and thriving community of marine invertebrates, including sea snails, abalone, and tubeworms. The rocky surfaces are often dotted with limpets and tiny crabs scurrying between tide pools. Just a bit further out, in the subtidal areas, dense seaweed gardens flourish, featuring tall bull kelp forests that sway with the currents alongside delicate red and green seaweed beds, creating a lush underwater landscape. Schools of small fish, such as wrasse and gobies, dart among the kelp fronds, adding movement and color to the scene.
Vibrant Marine Ecosystems Between the Reefs
The narrow channel between the inner and outer reefs harbours a more tranquil environment, supporting soft coral gardens, vibrant sponge colonies, and vibrant beds of sea urchins. The relatively calm waters here allow for thriving growth of soft corals in stunning hues of pink, purple, and orange, alongside large sponges that act as habitats for small marine species. Rays and Port Jackson sharks can sometimes be spotted gliding through this serene part of the reef, drawn by the plentiful food sources and shelter.
Diving and Snorkeling Adventures
For adventurous visitors, Marengo Reefs Marine Sanctuary offers diving and snorkelling opportunities that reveal the reef’s full beauty below the surface. With excellent underwater visibility on clear days, divers can explore caves and crevices home to rock lobsters, nudibranchs, and an array of vibrant fish. Snorkelers will find shallow waters near the inner reef ideal for observing marine life up close, as soft corals, anemones, and fish clusters can be seen just beneath the surface.
Explore with a Tour
Guided tours are available to help visitors fully immerse themselves in the sanctuary’s natural wonders. Knowledgeable guides offer insights into the sanctuary’s ecosystems, biodiversity, and conservation efforts, ensuring a safe and enriching experience.
For more information on planning your visit, be sure to check the Marengo Reefs Marine Sanctuary map and guidelines for reef exploration.
