Your post reminded me of one of my last dreams, where I also saw a sea horse (though I don't quite remember the rest of the dream). I tried to look up what it means. Apparently sea horses reflect one's current emotions. The best interpretation of the sea horse element (for me) was that it symbolizes the need for security and/or the need to offer someone else comfort.
Not sure if it has anything to do with your emotions, but I thought I would mention it.