Whale Rocks / Hidden Reef: Wall Diving at Trou aux Biches

Whale Rocks, sometimes called Hidden Reef or The Amphitheater, lies just beyond Pointe des Canonniers near Trou aux Biches. This site is defined by a distinct wall that slopes down to a maximum depth of 26 meters. As with many dive sites situated on a point or headland, the geography here acts as a natural aggregation point, funnelling nutrients and attracting larger marine life. The descent itself brings you directly to this wall, where you’ll begin to appreciate the scale of the structure.

The wall itself is covered with hard and soft corals, providing ample opportunity for closer inspection as you drift along. You’ll find a good distribution of gorgonian fans catching nutrients from the current, alongside delicate glass corals adding to the vibrant colours. The play of light on the coral life, particularly in the shallower sections, creates a striking visual. This healthy benthic community forms the foundation for the larger invertebrates and fish that frequent the reef.

Current is a defining characteristic of this site, often moderate to strong, making it ideal for drift diving. These currents aren't just ocean patterns; they can be influenced by winds blowing from kilometres away, shifting and altering water conditions. This constant water movement ensures a steady supply of nutrients, drawing in bigger fish that patrol the wall. Planning your entry and exit with the prevailing current is key to enjoying the dive without excessive exertion.

While the specific species are not always predictable, the presence of these currents and the site's exposed location make it a consistent spot for encountering larger pelagic fish. These can include barracuda (Sphyraena barracuda), fusiliers (Caesionidae), and various species of trevally (Caranx ignobilis) moving along the wall. Keep an eye out into the blue, as the open water often reveals glimpses of these faster-moving residents.