Critter of the Month

Critter of the Month gives a peek into the lives of Puget Sound’s least-known inhabitants – mud-dwelling invertebrates collected by the Marine Sediment Monitoring Team. Each month we feature a different species or group, giving information on identification, habitat, and life history.
Critter of the Month gives a peek into the lives of Puget Sound’s least-known inhabitants – mud-dwelling invertebrates collected by the Marine Sediment Monitoring Team. Each month we feature a different species or group, giving information on identification, habitat, and life history.

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This creeping pedal sea cucumber might just give you the creeps!
Move over, bats and spiders! With its blood-red tentacles and scaly body, the creeping pedal sea cucumber might just be the next creature to haunt your Halloween nightmares.
Things that go bump in the night: the sea spiders look a fright
Sea spiders have segmented bodies, hard exoskeletons, and long, thin legs like land spiders, but they are not closely related.
A moment in the sun for the common sun star
With its bright sun-like appearance, the common sun star is one of the more beautiful creatures in Puget Sound.
Pea crabs, the ultimate unwelcome houseguests
Pea crabs are very tiny. They can be found inside oysters, marine worms, or — especially in the Pacific Northwest —in ghost shrimp burrows.
Moss animals: Animals in plant disguises!
Bryozoans take on many different growth forms that provide habitat and shelter for juvenile fish and invertebrates. Some resemble fans or lace, while others appear more geometric.
All you need is mud! The sea mouse is muddy but mighty
The sea mouse may be brown and fuzzy, but that is about all it shares with its mammalian namesake. Believe it or not, the sea mouse is actually a marine segmented worm, or polychaete.
Don’t go breaking my heart, crab!
As rare and wondrous as true love itself, the heart crab maintains a quiet existence, delighting the hearts of those lucky enough for a chance encounter.
Flora or fauna? The tube-dwelling anemone lights up the Sound with its "blooms"
Meet the tube-dwelling anemone, a delicate blossom at the bottom of Puget Sound.
Meow we’re talking…about the catworms
June is National Adopt-a-Cat Month. But what about the benthic version of our purrrfect pals? Let me tell you a tail of the catworms...
Stretch it out: The squat lobster finds strength in flexibility
It’s almost January, which for many, means healthy New Year’s resolutions. This month’s critter varies its routine to stay in shape year-round, in order to adapt to life in a changing ocean.