Welcome to SowPubs.

Try using some of the following Free Keyword tools...

Play around a little with SeaWeeds and related Keyword phrases...

All kinds of ideas will Pop out ready for Googling and Searching out the Possibilities...

And any other Niche or micro niche for that matter....

http://www.keywordworkshop.com/pages/Free-Tools-Listing
http://freekeywords.wordtracker.com/

Definitely some interesting SeaWeed ideas & stuff if you have Free Access to SeaWeed like some of us Do!

Phil