Marine Species: Mantis Shrimp

It’s easy to overlook the ocean’s smallest crustaceans when you’re on the hunt for the big boys. But not seeking out the fascinating mantis shrimp on your next dive would be a big mistake.

What is the mantis shrimp?

The mantis shrimp, or Stomatopoda, are marine crustaceans. Called sea locusts by ancient Assyrians and prawn killers in Australia, more recently they’ve been called “thumb splitters,” because of their ability to inflict painful cuts on divers or those who handle them. There are over 450 different species of mantis shrimp. Most grow to around 4 inches long, though a few can reach lengths of almost 12 inches. They can vary in color from simple brown to vivid neon and are among the most important predators in shallow tropical and sub-tropical waters