Frogfish
Weirdness 9/10

The fish that walks on its fins and has the fastest mouth on Earth

This fish walks instead of swimming, and it has the fastest mouth on Earth.

📋 Fact File
🐾 Fish🍽️ Carnivore (can swallow fish longer than itself)
📏 Size
Most kinds are about 5-25 cm (2-10 in) long
Many are about the size of a tennis ball
Lifespan
Not well known — perhaps up to about 10 years
Not EvaluatedFrogfishes as a group haven't been given a Red List rating — they depend on healthy reefs to hide in.
🤔 Guess first

Which one is REALLY true about the Frogfish?

The short version

The frogfish is a lumpy, sponge-like reef ambush predator whose fins have become stubby legs, so it clambers along the seabed instead of swimming. Its warty body mimics coral and sponge, and a built-in fishing rod on its head waves a lure to draw prey close. It swallows prey in about 6 milliseconds — faster than any other vertebrate — including animals bigger than itself.

Why it's so weird

  • The Frogfish walks across the seabed on stubby leg-like fins instead of swimming.
  • The Frogfish swallows in about six milliseconds, the fastest strike of any vertebrate.
  • The Frogfish waves a built-in fishing rod on its head, a thin stalk tipped with a wriggling lure, to pull curious fish in close.
  • The Frogfish is covered in warts, flaps and filaments that make it look exactly like a lump of sponge or coral.
  • The Frogfish can gulp down animals bigger than itself.
📏 How big is it, really?
Frogfish
15 cm
Frogfish
a 7-year-old
1.2 m
🧒

You could line up about 8 of them along a 7-year-old!