Giant 'Swamp King' Fish Rescued From Flood loading...
Giant 'Swamp King' Fish Rescued From Flood
In a six-hour mission, locals saved the critically endangered fish and rereleased it back to its home.
New Fish Species Lives 8 Kilometres Underwater—A Record loading...
New Fish Species Lives 8 Kilometres Underwater—A Record
Scientists have formally identified a new species of snailfish, the deepest ever caught in the Mariana Trench. A related species has been filmed but never collected.
Swimming Inside A 'Fish Tornado' loading...
Swimming Inside A 'Fish Tornado'
The waters of Cabo Pulmo, Mexico, teem with life—a reminder of what the oceans were like a century ago.
Climate Change May Shrink the World’s Fish loading...
Climate Change May Shrink the World’s Fish
A new study suggests warming sea temperatures could result in smaller fish sizes.
Two Massive ‘Sea Serpent’ Oarfish Wash Up on Beaches loading...
Two Massive ‘Sea Serpent’ Oarfish Wash Up on Beaches
Another oarfish stranding stokes the rumour that they wash up on shore before earthquakes.
Watch: Confused Suckerfish Tries to Latch Onto Diver loading...
Watch: Confused Suckerfish Tries to Latch Onto Diver
The suckerfish, also known as a remora, mistakenly thought the diver was a big fish or a shark.
Bird Filmed Feeding Goldfish—Here’s Why loading...
Bird Filmed Feeding Goldfish—Here’s Why
Are birds that feed fish good Samaritans or just confused? Experts weigh in.
Strange Deep Sea Fish Likely Filmed for First Time loading...
Strange Deep Sea Fish Likely Filmed for First Time
The small, ghostly creature was caught on camera swimming more than a mile below sea.
These Animals Thrive in the Hottest Places on Earth loading...
These Animals Thrive in the Hottest Places on Earth
Pupfish, foxes, and asses are among the creatures that like it hot.
Transgender fish found in British Rivers loading...
Transgender fish found in British Rivers
From flushing harsh chemicals down the toilet.
Watch This Venomous Fish Camouflage Into Its Surroundings loading...
Watch This Venomous Fish Camouflage Into Its Surroundings
A diver captured video of this little-understood species expertly blending into the ocean floor.
About the Show
Dr Zeb Hogan, National Geographic Explorer and an aquatic ecologist goes on his journey to find the largest freshwater fish in Australia – the freshwater sawfish, a cross between a shark and a chainsaw. These amazing monsters are nearing extinction but our continent is a stronghold for this elusive fish. Zeb gets in the water to learn about the sawfish's amazing hunting technique, stunning prey with its saw-like rostrum and then eating it whole. Zeb teams up with a local scientist, David Morgan and the indigenous Jarlmadangah Rangers, to catch and study the monstrous sawfish in the Fitzroy River in the country’s northwest. Zeb travels deep upstream into the desert where freshwater pools hide huge predators like the saltwater crocodile and bull sharks. Zeb and the team follow the sawfish migration from the estuary upstream and back again until they return to the sea. He tags and releases many sawfish, from a month old baby to a 2.2-metre megafish on its way to the ocean where it could someday grow to be a monster 7-metre fish.

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