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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Think pink: bloodworms rule the beaches of South Sound
Bloodworms are a type of polychaete, or marine segmented worm, in the family Glyceridae.
Put a bow on it: Elevate your gift-wrapping game with the ribbon worms
This year, when you spend more time wrapping your holiday gifts than picking them out, think about a group of critters who have taken their gift-wrapping game to the next level: the ribbon worms.
Life’s a beach for the false sandcastle worm
With its beachy name and sandy dwelling, the false sandcastle worm is the quintessential beach bum.
Snuggle up! The common slipper snail gets close for comfort
The first days of fall are here, and nothing makes me want to pile on the cozy layers like the arrival of the rainy season. This month’s critter embodies the fashion motto of 2020: comfort is IN.
The striped nudibranch: Don’t mess with this ferocious sea slug!
Nudibranchs, or sea slugs, are the elegant, marine-dwelling cousins of the slimy brown slugs you find in your garden.
It ain’t easy being green…unless you’re a kelp humpback shrimp
Top o’ the morning to you! Take a lesson in wearing green from the kelp humpback shrimp, who woke up dressed and ready in its Irish best.
Here comes the sun! The golden petal worm shines like the rays of the spring sun
This month’s critter has a set of flowery petals that shine through the dark waters of Puget Sound like the golden rays of the sun.
Babies of the Benthos – Worm Edition
In this Critter edition, let’s dive into the “birds and the bees” of benthic worms, and the resulting faces that only a mother (or an invertebrate taxonomist) could love.
Thrills, spills, and frills: The pink tritonia takes us on a wild ride
What’s pink, white, and frilly all over? It's the pink tritonia: the walking (or in this case, crawling) embodiment of the excitement — and terror — of blossoming love.
If the spirit moves (mud): The burrowing ghost shrimp
Fall’s chill is in the air and decorations are going up all over town. Meanwhile, under the mud of Puget Sound, there’s a critter that stays in its costume all year long – the burrowing ghost shrimp.