Megafish
The 24-hour hotline saving the world’s biggest freshwater fish
The epic migration of a 6-foot long, 200-pound catfish
What made megalodon such a terrifying predator?
Enormous stingray sets world record for largest freshwater fish
Saving North America’s biggest freshwater fish
These underwater beasts inspired fear and superstition
Southeast Asia’s most critical river is entering uncharted waters
This giant stingray could be world's biggest freshwater fish
Earth’s largest freshwater creatures at risk of extinction
River sanctuaries help giant fish recover in Southeast Asia
Baby Giant Mekong Catfish are Hard to Find
Loch Ness Monster Hunters to Try DNA Search? Get the Facts.
Rare Megamouth Shark Captured on Video
New Giant, Air-Breathing Fish Discovered
In Search of the World’s Megafishes
load more
Legal
Terms of Use
Privacy Policy
Your US State Privacy Rights
Children's Online Privacy Policy
Interest-Based Ads
About Nielsen Measurement
Do Not Sell or Share My Personal Information
Our Sites
Nat Geo Home
Attend a Live Event
Book a Trip
Buy Maps
Inspire Your Kids
Shop Nat Geo
Visit the D.C. Museum
Watch TV
Learn About Our Impact
Support Our Mission
Masthead
Press Room
Advertise With Us
Join Us
Subscribe
Customer Service
Renew Subscription
Manage Your Subscription
Work at Nat Geo
Sign Up for Our Newsletters
Contribute to Protect the Planet
Follow us
National Geographic Instagram
National Geographic Facebook
National Geographic Twitter
National Geographic Youtube
National Geographic Linkedin
National Geographic Tiktok
National Geographic Reddit
United States (Change)
© 1996–2015 National Geographic Society
© 2015–2026 National Geographic Partners, LLC