Third verse:
The seals sing a lament
Because they can't wave with their tails [can't get this bit -such a shot?]
The sheep they bleat stupidly on the dyke [sea wall]
And decorate it with greenish-black balls

There, I bet you wish you hadn't asked. But I can make the chorus rhyme, with a bit of poetic licence:

On the north sea coastline, on the cold German sand
There are fish in the water, but not on the land

It makes the Wild Rover sound like Shakespeare.

I should think some real German-speaker will come along before long to tidy up my rather ragged efforts.

Marje