Character from the Swedish comic strip Bamse.

Skalman (Shellman) is a green turtle who's a mad inventor and a friend of Bamse. His most famous invention is "mat och sovklockan" (the food and sleepwatch) which rings when he has to sleep or eat. He follows it blindly (he has been found sleeping on the moon) even it could lead to death or severe injury to him or his friends. Fortunately this hasn't happened yet. When he sleeps, NOTHING can wake him up. This also causes a lot of trouble to his friends.