Megamouth Shark
Megachasma pelagios
A rare giant mouth follows krill through dim water.
The Megamouth Shark is a slow-moving filter feeder with a huge rounded head and a surprisingly soft body. Scientists encounter it so rarely that each documented sighting adds valuable clues about its life.
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Quick dive
Creature passport
- Home
- Open ocean in the Atlantic, Pacific, and Indian Oceans, moving between shallow nighttime water and deeper daytime water.
- Favorite foods
- Mostly krill, plus copepods, jellyfish, and other small drifting animals.
- Size check
- At least 17 ft (5.5 m) - about the length of a small car
Tell-your-friends facts
Four wonderfully wild things
- 1
The first known specimen was discovered in 1976 and required a new shark family, genus, and species.
- 2
It is one of only three giant filter-feeding shark species.
- 3
About fifty rows of tiny teeth line each jaw, but only a few rows are functional.
- 4
A tracked shark stayed shallow at night and descended more than 100 meters after dawn.
Ocean superpower
Built to be amazing
It pushes its jaws forward and expands its mouth to suck in plankton-rich water for filtering.
Junior scientist tip
What should I look for?
Find the enormous front-facing mouth, rounded snout, dark back, and pale belly.
Grown-up research links
We used trusted science organizations to check this profile.