Mantis shrimp

The Mantis Shrimp (シャコ, Shako) is a type of sea creature first found in.

In
Once the player donates a Mantis Shrimp to the museum, it can be found in the large pool in the first room of the ocean exhibit, along with many other species of sea creatures. It is found in the corner near the big rock close to the entrance of the large saltwater exhibit.

"Mantis shrimps have long, sickle-shaped legs and thick carapaces covering both their bodies and tails. They strike captured prey with claws powerful enough to crack the shells of even the toughest crabs. They are a popular dish with fans of seafood, though females with eggs are worth more than males."

In
When donating to the museum, Blathers will say the following:

"Think carefully before you mock the mantis shrimp for its diminutive size. I warn you, it's itching for a fight! A pugilist through and through, this brightly hued fellow packs a punch unparalleled on land or sea. Not only are its forelimbs shaped like clubs and scythes, its arms are naturally spring-loaded too! Thus the mantis shrimp's high-speed blows crack open crab and oyster shells with ease. And should you grab it with your hands, you might discover why it's called "the thumb splitter" too!"