THE SAME UPSIDE DOWN

A word of five letters,
Upside down is the same,
A shark does this,
But it's not to be blamed,
What is the work?

I have been doing this post because I think most of the people on steemit are too serious. And i think this community needs some cool down. I think this community has potential to rise up more than facebook. The only thing required is some fun and some user friendly interface.

I hope I could help this community to rise. If you like my post dont forget to upvote and resteem it.

Thank You.