"I got a flatworm! Why's it so flat? Steamroller?" —New Leaf

The flatworm is a benthic animal found at the bottom of the ocean in New Leaf and New Horizons. Diving is the only way to get it.

Donation to the museum

In New Leaf

In New Leaf, an information board in the aquarium will list information about this creature.

"Flatworms are flat creatures, and while some types look like sea slugs, they have little else in common. Some types are venomous and produce a poison similar to the kind blowfish are famous for. Flatworms are hermaphrodites and mate by fighting to determine the loser, who then bears the eggs."

In New Horizons


Encyclopedia Information

New Leaf

Deep-Sea Creature
Encyclopedia Information
"I got a flatworm! Why's it so flat? Steamroller?"
Size 1.5 inches
Time Night-Day
Season Summer

New Horizons

Encyclopedia Information
"I got a flatworm! Guess it forgot its spareworm."
Current Active Hours 4pm–9am
Months active (north) Aug–Sep
Months active (south) Feb–Mar


Further Information

Main article: Flatworm on Wikipedia

The word "flatworm" is used as an umbrella term for a vast amount of primitive creatures, ranging from as large as two feet long to completely invisible to the naked eye. The flatworm family, Platyhelminthes, consists of many dangerous parasites such as tapeworms and flukes, which are infamous for attacking livestock, humans, and many other animals—at least one species is known to infest whales. The nonparasitic animals usually called flatworms, however, resemble sea slugs or worms and are generally harmless to humans.

Deep-Sea Creatures
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Deep-sea creatures
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Deep-Sea Creatures (New Horizons)DivingOceanTropical Seas
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