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Sticker of Western sea slater
Bug card No. 4693 of 4,939

Western sea slater

Ligia occidentalis
Eats: Leftovers and dead thingsWoodlicePonds, rivers and shores14 legsNot an insect, but a bug cousin

The western sea slater is a big cousin of the woodlouse that lives on rocky seashores. It has a sleek, flat body and large eyes. If you get close, it zooms away and hides in a crack in the rocks.

Fun fact: woodlice are not insects. They are crustaceans, cousins of crabs and shrimps, that live on land.
Lives in
The Pacific coast of North America, from Mexico to British Columbia, on rocky shores
Top speed
about 0.15 km/h (0.09 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It does not bite or sting, it just runs away fast.
What does it eat?
At night it comes out to nibble on seaweed and bits of dead stuff along the beach.
For real!Photo of Western sea slater
Picture by Justin Johnsen. CC BY-SA 4.0, via Wikimedia Commons.

How fast is it?

cool stuff

Fun facts

1

During the day it hides in rocky cracks above the line where the high tide reaches.

2

It breathes with gills that must stay damp, but it cannot stay under water for long, or it will drown.

3

It has two long prongs at its tail end, much longer than those of its close cousin.

4

It comes out at night or when the weather is cool.

you asked

Most asked questions about Western sea slater

?Is the western sea slater dangerous?

No. It is harmless and runs away very fast when disturbed.

?Can a sea slater swim?

Not really. It needs damp gills to breathe, but it drowns if it stays under water too long.

For bug experts

Scientific name
Ligia occidentalis
Group
Woodlice
Family
Ligiidae
Classification
Malacostraca > Isopoda > Ligiidae
Lives on
North America

Where the facts come from

  1. Ligia occidentalis (Wikipedia, CC BY-SA 4.0): what it looks like, where it lives, what it eats, sizes and fun facts, retold in simple words.
  2. Picture by Justin Johnsen. CC BY-SA 4.0, Wikimedia Commons. The sticker of this bug is drawn from this picture.

If we got something wrong, sorry, we are bug fans, not a science journal. Tell us at [email protected] and we will fix it.

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More from the same group: Woodlice

Also at home here: Ponds, rivers and shores

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