[D-fendr]

They specifically say that the reduction in oxygen levels is insufficient to cause problems.

Do you still have your source for the Pelican scientists saying this? My 30% came from here:

http://www.mnn.com/earth-matters/wilderness-resources/stories/scientists-to-study-deepwater-oil-plume

[Wonder Warthog]

"Do you still have your source for the Pelican scientists saying this?"

Yes. Can I provide a link, probably not. I look through a LARGE number of documents in the course of a day. If I tried to save the URL's of all of them, I'd need a separate hard disk just to hold them. BUT, the info I found was straight from the Pelican's personnel (captain??? I don't recall exactly who).