Black fish of my glass jar

I bought a little fish today
For my new glass-jar
Was black in color
looked kind of unique

I bought some happiness
To fit with my new window
Next to the glass jar
In which my little fish just wept

I bought a shipwreck for my fish
to hide into
deep in the shadows
of an even darker bliss

Black was the fish I bought to make me happy
And in the blackness it was lost forever since.