Mollusks, Worms, Sponges, Starfish

The life cycle of the parasitic rat lungworm involves rats spreading it to snails and slugs, which pass it back to rats.

Parasitic, Invasive Worm Found in Rats in Georgia

While the worm can sicken people, few human infections have been reported in the U.S., and it typically doesn’t require treatment

Moose numbers have plummeted in Minnesota.

What's Killing Minnesota's Moose? Studies Reveal Sites of Deadly Brainworm Transmission

Carried by deer and spread by snails and slugs, a lethal parasite is infecting the large ungulates, which have recently declined dramatically

Doctors suspect the patient accidentally ingested the roundworm's eggs while foraging for edible greens near her home.

Doctors Pulled a Wriggling, Three-Inch Worm From a Woman's Brain

The incident in Australia is the first known occurrence of the roundworm—typically found in snakes—infecting the brain of a mammal

Fossilized poop, called coprolites, collected in Nong Yakong village, Chaiyaphum Province, Thailand. Coprolites are an important source for studying ancient parasites.

200-Million-Year-Old Poop Reveals Parasites That Infected a Crocodile-Like Reptile

The prehistoric fossil could help researchers understand the relationships between parasites and host organisms in the Late Triassic

Permafrost melts into the Kolyma River outside of Zyryanka, Russia, in 2019. The worms in the new study seem to have survived buried deep in the permafrost for tens of thousands of years.

Scientists Revive 46,000-Year-Old Roundworms From Siberian Permafrost

The nematodes had survived in a state of slowed metabolism called cryptobiosis, according to a new paper

A giant African land snail

Giant Snails Take Over Part of Florida—Again

Officials issued a quarantine to control the invasive species, which devours vegetation, damages structures and can carry a parasite dangerous to humans

This is the first documented rainbow sea slug in a rock pool in the United Kingdom.

Rare 'Technicolor' Rainbow Sea Slug Found in England

It's only the fourth record of the species in the U.K., and experts say it's a sign of warming waters due to climate change

Hormiphora californensis, also called the California sea gooseberry, is a comb jelly common in California coastal waters.

Comb Jellies May Be the World's Oldest Animal Group

A new study suggests that ancestors of comb jellies, not sponges, were the first to break off from the common ancestor of all animals

Before they made their big flight to the South Pacific, the snails were adorned with dots of red, UV-reflective paint to help conservationists find them in the dark.

Scientists Reintroduce 5,000 Snails to French Polynesian Islands

The project's organizers say it's the largest-ever release of creatures that are extinct in the wild

Large land snails are rich in nutrients and can weigh up to about two pounds.

Humans May Have Eaten Giant Snails 170,000 Years Ago

Shell fragments from a cave in southern Africa show signs of exposure to extreme heat, suggesting they were cooked

Many animals like corals release eggs and sperm into the water on just the right nights of the month.

How Lunar Cycles Guide the Spawning of Sea Creatures

Researchers are starting to understand the biological rhythms that sync worms and corals to phases of the moon

Scientists have discovered the first living C. cooki specimen.

Researchers Find Living Clam Thought to Have Gone Extinct Thousands of Years Ago

While looking for sea slugs in California, a marine ecologist came across the tiny, ten-millimeter mollusks

An artist's renditon of the "alien goldfish." Scientists identified a toothy structure in the animal's gut, suggesting it was some kind of mollusk.

Mysterious ‘Alien Goldfish’ May Have Been a Mollusk

The bizarre creature’s anatomy had stumped scientists for decades

Barnaby Domigan with the giant earthworm

Nine-Year-Old Finds a Three-Foot-Long Earthworm in His Backyard

The New Zealand boy named the creature “Dead Fred”

A species of Chelonaplysilla sea sponge ejects mucus.

Sea Sponges Sneeze Sediment-filled Snot

New research reveals the animals expel mucus as a form of self-cleaning and other creatures eat the stuff up

Black turban snails are small marine snails that make tasty prey for crabs. Failed crab attacks leave scars on a snail’s shell. By analyzing the rate of scarring and the size of the snail when it was attacked, researchers can learn important details about crab populations.

Scars on Snails Offer a 100,000-Year Record of Crab Populations

A surprisingly simple technique for studying marks on shells shows how California’s crab population has changed over millennia

The offering consisted of 164 starfish, chunks of coral, seashells, pufferfish, a resin figurine, animal bones and the skeleton of a female jaguar holding a spear in its claw.

Trove of Starfish Deposited as Offering to Aztec War God Found in Mexico City

Researchers discovered 164 sea stars placed in the Templo Mayor around the turn of the 16th century

A flashy jewel bug butt. 

Science Twitter's 'InverteButt Week' Puts Backsides on Display

The behinds of spineless organisms are diverse among species and serve a multitude of purposes beyond expelling waste

Mollusks maintain the symmetry of their pearls by adjusting the thickness of each layer of shimmering nacre. If one layer of the pearl’s nacre is thinner, the next layer is thicker and will balance out irregularities over time to create a smooth, uniform pearl that isn’t lopsided.

How Pearls Obtain Their Remarkable Symmetry

A concept called 'pink noise' brings order to seemingly disorderly patterns seen in classical music, seismic activity, economic markets and even pearls

For a tiny, soft-bodied worm, seeking shelter by way of hermiting behavior likely protected it from predators.

Penis Worms May Have Been the First Real Hermits

Hermit crabs may have evolved hermiting behavior 180 million years ago, but penis worms beat them by more than 300 million years

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