Jeff Trotta emailed me this link, which has some beautiful footage of a manta/diver dance, plus information on a new species of manta ray. No scientific data is presented, but it's worth watching!
Andrea Marshall a rising star in elasmobranch (shark and ray) science has discovered a second species of manta ray while doing research in Mozambique. Go to http://www.saveourseas.com/Video/#id=album-2&num=1 to see a gorgeous video of Andrea diving with one of her animals and talking about her discovery.
