In Sweden there is a game for children, 'gömma nyckeln' (hide the key), in which a key is hidden somewhere in the room and then the children are to look around searching for it. Usually it is lying there quite visible, but there are many places to look in. In order to give clues during the search advice is given such as 'it is getting warmer', an indication that you are closing in on the target, or 'it is getting colder' which means the opposite.

Here we have - as I am quite certain - the opposite to the preceeding glyph. The left and right parts look the same, but the middle part is a fish instead of a bird. When searching for the key an initial advice is always given: 'fågel', 'fisk' or 'mittimellan' (bird, fish or in-between). Like the universe itself it is useful to divide space of the room into three domains: high, low and middle.

Which means that I believe that this glyph is showing the sky on the other side of the earth, down below were the fishes swim.