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Sticker of Sea slater
Bug card No. 1204 of 1,500

Sea slater

Ligia oceanica
Eats: PlantsWoodlicePonds, rivers and shores14 legsNot an insect, but a bug cousin

The sea slater is a big flat woodlouse that lives on rocky seashores. It has long feelers and big eyes, and it is grey, brown or olive green. It is very quick and scuttles into cracks in the rocks as soon as you come near.

Fun fact: woodlice are not insects. They are crustaceans, cousins of crabs and shrimps, that live on land.
Lives in
Rocky coasts of Europe, from Norway to Morocco, and a few places in North America
Length
2 to 3.5 cm (0.79 to 1.4 in)
Top speed
about 0.26 km/h (0.16 mph)
On foot, estimate
Can it hurt you?
Harmless
Harmless. It cannot bite or sting and just wants to hide.
What does it eat?
It eats seaweed, especially bladderwrack, and also tiny algae and bits of rotting seaweed and plants.
For real!Photo of Sea slater
Picture by me'nthedogs. CC BY 2.0, via Wikimedia Commons.

How big is it?

How long is it?

Sea slater about 3.5 cm long (1.4 in)A toy building brick about 3.2 cm (1.3 in)A crayon about 9 cm (3.5 in)A banana about 18 cm (7.1 in)
as long as 6 grains of rice in a rowit has about 14 legscould run across a dinner table in 14 seconds

How big is Sea slater compared to YOU?

Just maths in your browser. Nothing is saved or sent anywhere.

How fast is it?

cool stuff

Fun facts

1

It is the biggest member of the woodlouse group, up to 3.5 centimetres long.

2

Even though it lives by the sea, it breathes air and stays out of the water.

3

It hides in cracks during the day and comes out at night to eat.

4

Its feelers are two thirds as long as its whole body.

5

A baby sea slater is born with one pair of legs missing. It grows the last pair later.

you asked

Most asked questions about Sea slater

?Is a sea slater a bug?

It is not an insect. It is a crustacean, a cousin of crabs and woodlice, with 14 legs.

?Can sea slaters swim?

They live on the shore and breathe air, so they avoid going into the water.

?How big is a sea slater?

It is 2 to 3.5 centimetres long.

For bug experts

Scientific name
Ligia oceanica
Group
Woodlice
Family
Ligiidae
Classification
Malacostraca > Isopoda > Ligiidae
Lives on
Europe, Africa, North America
Also known as
Common sea slater, Sea roach

Where the facts come from

  1. Ligia oceanica (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 me'nthedogs. CC BY 2.0, Wikimedia Commons. The round sticker of this bug is cut from the same 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.

More from the same group: Woodlice

Also at home here: Ponds, rivers and shores