Captured in mist net, banded, and released.
Some sort of sea grass in Guam.
Called chunge' in Chamorro. A white tern near Guam on Cocos island.
I'm thinking this will be hard to identify because of the picture...i didn't have an underwater camera at the time so it's hard to make out but it is a kind of spiny sea cucumber at a beach in Guam.
Black Sea Cucumber...very abundant in the beaches of Guam. Called balate' by the Chamorro.