This is a 2 decimeter long that moves slowly over the sandy bottom of the seas.
Here its searching for borrowed worms and dead animals.
When a dead seamouse washes up on shore, it looks like a
wet mouse, hence it's name "sea mouse".
The most imporant way of defence of the seamouse are his camouflage greyish colors.
But if seen from above the seamouse shows all kind of colors, that quickly change.
This light effect deters fishes.
slow decline of the seamouse
The seamouse usedto be a often seen inhabitant of the North sea, but has almost completely dissapeared.
The most important reason is the fishery, especially the bottom trawling.
Bottom trawling is towing a fishing net along the sea floor,
which not only kills the seamouse but its most important prey, the sea slug, as well.
sea mouse distribution
Sea mouse can be found in large parts of the seas.
They can be found up to 2000 meter under the surface.
The seamouse lives in the North Atlantic, the North Sea,
the Baltic Sea and the Mediterranean.
The defence to potential predators by using reflecting color
works the best if the light comes from the same direction a the predator.
In the depths of the ocean theres is no light, exept from light emitting fishes.
Probably here has the sea mouse the greatest benefits from its defence.
fotonic cristals of the seamouse
The hairs of the seamouse (also called the setae )
are covered with hexagonal fotonic cristals that reflect light and
change it color. The small cristals reflect only the light in the direction it came from.
Worms, living in the sea. From Meyers, 1905
1 arrow worms or Chaetognatha
2 Rhynchonerella gracilis
3 Lineus kennelii, ribbon worm or proboscis worm
4 Dasybranchus caducus, a polychaetes or bristle worm
5 Discocelis tigrina, a flatworm
6 Ptychodera clavigera, a polychaetes or bristle worm
7 Sipunculus nudus, sipunculid worms or peanut worms
8 Chaetopterus variopedatus, a polychaetes or bristle worm
9 roggenbloedzuiger of Pontobdella muricata
10 Pseudobiceros undulatus, flatworm
11 Callioplana marginata, flatworm
12 Lineus molochinus ribbon worms or proboscis worm
13 Halla of pathenopeja
14 Bonellia viridis, Echiura, the trunk is only shown.
15 Euborlasia inmaculata, ribbon worms or proboscis worm
16 sea mouse or Aphrodita aculeata, a polychaetes or bristle worm
17 polymeria nebulosa
18 Eunice macrobranchia, a polychaetes or bristle worm
19 Eteone syphodonta
20 Nereiphylla paretti, a polychaetes or bristle worm
21 Yungia aurantiaca, flatworm
22 Serpula of Hydroides uncinata, a polychaetes or bristle worm