Diving at the Mackerel Islands offers a chance to explore new dive sites teeming with a high diversity of corals and fish life who have often never been in contact with a human being. Most sites are between 3m and 18m and require a moderate level of experience. Thevenard Island is the main base, with all the essential facilities required for excellent dive expeditions.
Among the dive sites are Rankin Road, Black Flag, Brewis Reef, Trap Reef, Sultans Reef and Sheltered Coral Gardens – idyllic for underwater photography and to see nature at its most beautiful, audacious and challenging. Typical creatures to swim amongst include whales, dolphins, gropers, reef sharks, tawny nurse sharks, stingrays, wobbegongs, turtles, olive green sea snakes, thick trevally schools, snapper, pearl perch, fusiliers, batfish and silver drummer.
Mackerel Islands provides a dive tank refill service from the PADI dive centre on Thevenard Island for guests who bring their own boat and dive equipment. Alternatively, let us show you and your group our secret dive locations on a 3 night diving adventure with dives departing Thevenard Island daily, for group bookings of 6 or more.
- PADI certified dive centre
- Dive tank refills
- Snorkel set hire available from the island activity centre
- For group bookings of 6 or more – Dive charters operating from our new custom built charter boat, Island Escape
Read an article from the DiVELOG Magazine, WA’s New Diving Hot Spot, written back in 2010 by Nigel Marsh. Whilst some of the information is no longer applicable (MIDive is not currently in operation, and it’s much easier to get to us now!) it provides a good recount of a dive expert’s experience in our waters. Additional images are available to view on the Nigel Marsh Photography site.
Watch a short video clip from Season 5, Episode 4 of Destination WA, Diving the Mackerel Islands.
For those of you who like swimming among BIG schools of fish, Rankin Road is the location for you. Five kilometres from Thevenard Island and 18 metres down, it’s not unusual to get 40 rankin cod following you around while you explore the length of a sub-sea wall. Sea snakes, reef sharks, coral trout and many pelagic species school at this site making it one of the fishiest places to be in the Mackerel Islands. Photographic heaven.
Closer to Thevenard Island, Sultan’s Reef features a coral lined wall 14m deep rising to 6 metres (tabletop), making for an easy safety stop at the end of the dive. hone uw photography on nudi species / doubling as safety stop. The wall is visited by ‘pelagic’ fish (the pelagic zone is the zone in between the ocean floor and the surface) and observed by permanent reef species. It attracts larger species with mackerel and barracuda schooling the edge. The top of the site contains colonies of anemones and clown fish, colourful soft corals and small ‘benthic’ treasures – treasures found on the sea floor. This site has a lot of potential – being a lengthy wall is yet to be fully explored.
With some of the most brilliantly incandescent corals in caves and ledges sitting 17 metres down, the Black Flag site just has to be seen. Featuring large gorgonians and black coral trees in only ten meters of water, it has resident olive sea snakes, Queensland groper the size of a small car, and sleeping leopard and nurse sharks (which you’ll most likely see on any dive amongst the islands). Black Flag and nearby Paroo Shoals are both favourites for an incredible diversity of nudibranchs, so if you like to look small, these are the sites to see.
Consisting of many clusters, the Trap Reef sites lie between three and 13 metres deep. Crevices, overhangs and small caves are scattered throughout. Dense clouds of pomfrets and Spanish flag are abundant, while larger coral trout and Chinamen fish lurk in wait. Turtles, reef sharks and mangrove jack have also been frequent visitors. Soft and hard corals in cobalt blue, pink, yellow and vermillion impart kaleidoscopic hues among this beautiful seascape.
Shallow Protected Coral Gardens
Large coral bombies, cabbage leaf and green tree coral outcrops are common to sites located close to the islands. Many of these sites are calm, clear, protected from wind and make for excellent secondary dive locations. Shallow depths (mostly less than 6 metres) give long bottom times, giving you the opportunity to observe more subtle marine interactions. Schooling behaviours, the ‘hide and show’ of irrepressible damsels and chromis make for very calm and relaxing dives.