Hijiki seaweed - I like it prepared with carrots as in this recipe: http://www.beyondsalmon.com/2012/08/braised-carrots-with-hijiki-seaweed.html
I had to soak this ingredient in warm water and used a stainless steel bowl. When I went to photograph it, you couldn't see the floating particles very well, so I decided to try the flash in my phone camera, despite anticipated glare from the flash. Instead of glare I got beautiful colors.