Palau

Blue Corner in Palau's Rock Islands is considered by many underwater photographers and fish experts to be the finest dive on the planet. Strong tidal currents funnel past the reef corner carrying schools of grey reef sharks, white-tip reef sharks, barracuda, and enormous Napoleon wrasse, and divers use reef hooks to hold position while the fish action swirls around them. The wall itself descends from a shallow 10 m plateau into the deep blue of the Philippine Sea.

The German Channel is an artificial passage dredged by German phosphate miners in the early 1900s, now famous as one of Palau's most reliable manta ray cleaning stations. Reef mantas glide to the cleaning bommie at 20–24 m while divers rest on the sand and observe from below, and the channel walls on either side host dense gorgonian gardens and resident bumphead parrotfish schools. The site also has excellent macro life including various nudibranch species.

Jellyfish Lake on Eil Malk Island is a landlocked marine lake connected to the ocean through submarine fissures, home to millions of golden jellyfish (Mastigias sp.) that have evolved in isolation over 12,000 years and lost their stinging ability. Snorkellers glide through pulsating clouds of jellyfish that follow the sun across the lake, an experience unlike anything else in the natural world. Scuba diving with tanks is prohibited to protect the thermocline layer.

Palau Blue Corner Divers is a premier full-service operator based in Koror, running daily boat dives to Blue Corner — one of the world's top ten dive sites — where up-welling currents funnel across the reef's edge and attract enormous schools of barracuda, jackfish, and grey reef sharks by the hundreds. Hook-and-line diving is taught as standard for Blue Corner's famous corner hang, and the team's experienced divemasters navigate the site's complex currents with practised ease. The German Channel manta ray cleaning station and Jellyfish Lake snorkel tours are popular additions to multi-day dive packages.

Rock Islands Dive Palau takes guests into the labyrinthine World Heritage-listed Rock Islands Southern Lagoon, exploring WWII wreck sites in Malakal Harbour alongside pristine inner reef gardens protected from fishing since 1994. Palau's warm, clear Pacific waters are home to saltwater crocodiles in mangrove channels, dugongs in the lagoon shallows, and massive bumphead parrotfish schools at Ngemelis Wall. The centre operates guided freediving explorations through the marine lake system, where unique non-stinging jellyfish have evolved in isolation.