Our animals

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Northern lakes and seas

The ocean

Tropical rivers and lakes

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The Pond

Danish forest lake

The wide creek

Sturgeon

Danish stream

Axolotl

Herrings in the Sound

Boulder reef in the Sound

Small animals of the stone reef

Select species

Select a species to read more


Corkwing wrasse

Corkwing wrasse

Ballan wrasse

Ballan wrasse

Cuckoo wrasse

Cuckoo wrasse

Cuckoo wrasse

Cuckoo wrasse

Goldsinny-wrasse

Goldsinny-wrasse

Three-spined stickleback

Three-spined stickleback

Lumpsucker

Lumpsucker

Tadpole fish

Tadpole fish

Topknot

Topknot

Greater weever

Greater weever

Eelpout

Eelpout

Shorthorn sculpin

Shorthorn sculpin

Green crab

Green crab

Edible crab

Edible crab

Common starfish

Common starfish

Edible sea urchin

Edible sea urchin

Dahlia anemone

Dahlia anemone

Plumose sea anemone

Plumose sea anemone

Common whelk

Common whelk

Common starfish

Common starfish

Facts

LatinAsterias rubens
Size50 cm
FoodBottom-dwelling and carrion eating
HabitatLives at the sandy bottom and in reefs in shallow and deep water. Very common in bivalve beds
IUCN

Not evaluated

Noboby knows if the common starfish is threatened in the wild

LocationNortheast Atlantic
Map

Lots of feet

The common starfish has a flat body with 5 arms. The lower surfaces of the arms have small tube feet. The tube feet are important for the common starfish: It uses them to walk, to hold onto things with them and open bivalve shells, and to eat the bivalves.

Slow eater

The common starfish is a slow hunter. When it wants to eat a bivalve, it encircles it with its arms. It separates the shell valves and inserts a fold of its stomach between the shells and secretes its stomach enzymes. This stomach enzyme weakens the bivalve and the common starfish starts to digest its body. You can see the stomach on the picture here.

An eye on each arm

At the tip of each arm, the starfish has a tiny red dot. This is a small eye. The common starfish can see the difference between light and dark but cannot see details.

Arms that regrow

If the common starfish loses an arm, it grows back again. The common starfish may also throw one of its arms if it feels threatened.

Find a common starfish

You can find common starfish in very shallow water, but also at 50 meters depth. The deeper the water in which the common starfish lives, the larger and lighter in colour it is. You can also find them washed up on the beach. The starfish lives in all Danish waters and can be seen year-round.


Angler

Eelgrass in the Sound

Faroese bird cliff

Seaotter

The Deep Sea: Pacific octopus

The Deep Sea: Japanese spider crab

American lobster